This 3-Piece Foam Tire Insert Replaces Air - Taipei Cycle Show 2019

Mar 27, 2019 at 2:44
by Mike Levy  
Taipei Cycle Show 2019
Has the insert game gone too far? This three-piece modular insert completely replaces the air that'd normally fill your tires.


Tire inserts are all the rage right now, with riders stuffing all sorts of strange looking contraptions in between their rim and rubber in an effort to come up with a flat-proof system. But if you don't want the air to escape, why not just skip pumping it in there in the first place and go down a different road?

Solid tire inserts aren't new by any stretch, but they've pretty much all been simple tubes of something or other that weigh a ton and, when you ride on them, feel like total shit.


Taipei Cycle Show 2019
The 29'' x 2.8'' models weighs 505-grams and a set goes for $125 USD.


Air Fōm's modular, three-part insets look like they're a long way from those simple inserts, though, and the new company is aiming to have riders think of their product as a high-end option for performance bikes. They'll have a ton of different sizes available, but the 29'' x 2.8'' version pictured here is said to weigh 505-grams, and $125 USD will get you enough to do two wheels.

So, why three different layers? Air Fōm went that route because each piece has a very different job, and they're made of very different materials, too.

The outer blue-colored stuff is ETPU foam, or expanded thermoplastic urethane if you want to be proper about it, and its job is to mimic the feel of a traditional air-filled tire. I was told that it offers a high energy return or, in simpler terms, is soft and rebounds quickly. It's also not brittle at all - I watched a section be bent nearly in half without issue - and is said to be nearly indestructible under the kind of abuse that mountain bikers would put it through. The closed-cell foam feels almost rubber-like, is apparently immune to temperature changes, and nothing like you'd expect from looking at photos.


Taipei Cycle Show 2019
Taipei Cycle Show 2019
Not your average tire insert, with the different colored sections each responsible for a different job.


The base layer - that grey stuff - is EPP foam, AKA expanded polypropylene, and it's how Air Fōm tunes the insert's ride characteristics. It sits up against the rim, with the white-colored joining section between it and the blue ETPU foam, and different densities can be installed to mimic pressures between 22 and 25 PSI.

Update: The original version of this article left out the fact that both EPP and ETPU foam are completely recyclable.

And speaking of installation, Air Fōm claims that while it's certainly more difficult than normal tubeless setups, the job should only take ten-minutes per end. Picking the right size for your needs is something that a bike shop might need to do, Air Fōm says, because it takes into account diameter (of course), tire size and volume, and internal rim width. There are three different sizes for 29ers and three for 27.5, ranging from 2.35'' to 2.75'', and seven to choose from if you need a set for your road, cyclocross, or gravel bike.


Taipei Cycle Show 2019
The inserts are split into four sections for shipping and to ease installation.


So, what do you guys think? Would you give 'em a try?


235 Comments

  • + 524
 I dunno, air is free, pretty hard to beat that price.
  • + 128
 That's a fair point.
  • + 137
 a bit lighter as well
  • + 116
 The most Scottish comment I've ever read Big Grin you could batter the foam though, air is pretty hard to put a deep fat fryer
  • + 19
 I'll go with the free, infinitely adjustable air as well. Within reason I can run my tires from 19 psi and up - and I can dynamically change it to meet the terrain I'm biking. Air weighs less, is more adjustable and free. I'm just not sold on inserts.
  • + 70
 Also, it is not polluting the environment.
  • + 90
 500 grams, I'll take the 2 flats a year
  • + 3
 @Ash-Ash: hahaha what a comment!
  • + 1
 Right on
  • + 16
 @Ash-Ash: pretty sure the air in Glasgow is deep fried!
  • + 66
 You can’t chew air. Tire insert for the win. Race it on sunday and gnaw on it when your owner isn’t looking all week.
  • + 11
 @IamTheDogEzra: A $125 chew toy? Bad dog.
  • + 3
 @dobermon: if you commute daily it is more than that and that is who they are for.
  • + 19
 Meh. I just run dh casings which don’t puncture or not very easily and come in better sizes and compounds than regular tyres. Once you’ve crammed your tyre with inserts it’s probably going to be heavier than a dh tyre with air so really what’s the point?
  • + 5
 @Ash-Ash: Yer bum's oot the windae!
  • + 4
 @Cammyd14: actually piss in myself at that comment.
  • - 7
flag Nickvivian (Mar 27, 2019 at 6:35) (Below Threshold)
 @szec: Ironically it is the air which is carrying the pollutants. Foam is not. Ha
  • + 7
 A nod's as guid as a wink tae a blind horse
  • + 1
 Lmfao spot on ????
  • + 3
 @Ash-Ash: OMG LOLOL!!! best comment of the day mate!
  • + 5
 @szec: I don't know. No matter how nice the crisp mountain air was when I put it in my tires, when it comes out it smells horrible.
  • + 2
 @thenotoriousmic: Dh tire has incredibly bad rolling resistance. With inserts you can run faster rolling tires therefore being a much nicer option for pedalling uphill. Once you are moving you don't really notice the weight, but rolling resistance, you are always fighting that.
  • + 3
 @vinay: I was once told that the white powder inside inner tubes is actually crushed fish bones and that’s why the air smells of fish. Obviously I haven’t done any tests myself.
  • + 1
 @gnarnaimo: it’s not going to be any worse than a regular tyre with a 500g insert in it.
  • + 1
 @thenotoriousmic: Inserts don't effect rolling resistance...so actually it would be worse. Sure the weights not ideal, but your logic isn't without its flaws.
  • + 1
 @dobermon: yep. Sounds brutally heavy. 800 gram Enduro tires with an aggressive pattern, plus a 500g insert!? This would probably be great for the gravity based crowd only.
  • + 2
 @gnarnaimo: my dh tire with trimmed center knobs and pumped to 30psi is going to have less rolling resistance than your tire insert that only mimics 20psi. Since going tubeless I have never used an insert and in three years of hard racing and riding in my very rocky region I've only had two flats. Both were caused from burps dropping my pressure too low.
That's just my experience though.
  • + 2
 @gnarnaimo: DH tyres are no different. Instead of protecting the tyre with a insert your using a heavier tyre. Shape, compound and tread effect rolling resistance.
  • + 1
 I'm sceptical of tire inserts. I guess if you're really hard on stuff, run low pressures and/or race then maybe they make sense, but the only time I've dented a rim in as long as I can remember was when I didn't notice the pressure slowly leaking out of my front tire and ended up riding a rocky trail with about 8 PSI up front. I typically run around 22-24 front and 24-28 rear depending on conditions.
  • + 1
 @Boardlife69: take it back
  • + 1
 @ssteve: not just that but if you do cut your tyre and need to put a tube in what do you do with the insert? Serious question I don’t know.
  • + 2
 @thenotoriousmic: if you cut your tire why would a tube be better than this?
  • + 1
 @Jimmy0: because with a 50¢ tire patch and a tube you can ride out on a solid wheel and tire combo unlike with an insert.
  • + 3
 @lifeofloon: I don't see any difference between ride out ability with a cut tire and this full insert, and a cut tire and an inflated tube
  • + 1
 @Jimmy0: because I want 30psi in my tires and this won't give me that even with a tire with no cut in it. I agree that this is a far better option than the Cush Core and Huck Norris style where you can ride out without completely destroying a rim but with no performance aspect at all. So for those fine with 20-25psi this sounds great. It's just not for me.
  • + 1
 @Jimmy0: what I meant is if you get a slash in your tyre that won’t seal and you need to put a tube in your tyre to finish the ride what do you do with the insert? Not talking about any one type of insert. I’ve never used them so I don’t know.
  • + 3
 People are already buying water, this is just the next logical progression.
  • + 2
 @thenotoriousmic: I just put a few zip ties in my bag. If I slash a tyre I zip tie the sealant covered insert to the outside. I suppose you could attach it to the frame if you didn't ride with a bag.
  • - 2
 not for long if AOC has anything to say about it! :-D
  • + 2
 @dobermon: Reading again, think it was 500 grams for both wheels... but still a fair point.
  • + 2
 @ssteve: how do you not notice 8psi in your front tire
  • + 1
 @szec: Air pollution exists. Stupid lousy air.
  • + 1
 @gnarnaimo: disagree. Don’t kid yourself about not feeling that amount of weight.
  • + 1
 @thenotoriousmic: I agree, but I also wonder if maybe you could get away with a lighter tire since you wouldn't flat (except with catastrophic failure, like full ripping), which could yield nicer ride characteristics. DH tires don't always have the best feel on all trails, nor the best rolling, but you still have to use them if you want to get rowdy and prevent flats with confidence.
  • + 2
 @mikelevy: well not exactly ....
How much for a good pump, pressure gage, some seal, tube in case of a flats, time you spent fixing a flat on the trail instead of riding.... shall I continue ? Air not exactly free Wink
  • + 1
 @thenotoriousmic: Not really. DH casings are much stiffer, which means when the deform & re-form over bumps and objects the sap more energy. Softer casing tires will deform and re-form without sapping as much energy and will keep you rolling faster and easier. Also Dh tires typically do have deeper bigger tread which isn't helping.
  • + 1
 @CircusMaximus: I run cushcore at 250 grams a tire plus double down tires and as far as noticing the weight while moving, well I don't. From a standstill or accelerating from lower speeds maybe. I'm consistently faster on all my local trails since adding this weight and have yet to get a flat or damage a wheel.
  • + 2
 @thenotoriousmic: Strap it to your frame with the same strap you used for you tube.
  • + 1
 @trialsracer: I completely disagree exo’s feel horrible compared to a dh casings. DH tyres are way better damped, track better and you don’t get that exo ping as your tyre reflects off stuff and you don’t need to run them at 30 psi plus to stop them burping ether. Only downside is weight which is obviously a big downside when it comes to peddling them around all day but inserts seem to be even heavier.
  • + 1
 @thenotoriousmic: You can disagree, but you're arguing with physics. Lighter more flexy casings have less rolling resistance. Theres alot of good literature on it out there. Maybe it's not your preference, but that doesn't change facts.
  • + 1
 @gnarnaimo: I’m not talking about rolling speed I’m talking about feel and dh tyres definitely feel nicer than single plys.
  • + 1
 @thenotoriousmic: Well that's just like.. Your opinion man. Lol. Well in that case, I feel inclined to ask if you have ever tried exo or double down with cushcore? ..because it remedies those issues and you get to keep the better rolling tire.
  • + 1
 @gnarnaimo: I’ve never used inserts and even if I did they’re not going to stop the tyre from tearing. I’ve got no choice but to use dh tyres really. Tore a double down maxx grip shorty on Sunday but they still pretty decent. I can happily run double downs on the front but I don’t have issues with dh tyres so I’d just be adding unnecessary weight.
  • + 1
 @thenotoriousmic: The inserts do help with preventing of tears, less inward flex from rocks equals less likelyhood of tears. Certainly not as indestructible as DH casing with inserts.. I've torn dh casing tires on lines that my DD with cushcore have had no issue on.
  • + 1
 @gnarnaimo: well, hard to argue with that! ????????
  • + 1
 @gnarnaimo: yeah I really don’t see the point in double downs and inserts. That’s heavier than a dh tyre with half the protection from tears and it won’t make any difference if it’s got an insert or not if it cuts on a sharp rock and there’s a lot of slate where I ride.
  • + 1
 @thenotoriousmic: Faster rolling and better dampening. Too each their own. I have had better luck with exos and dd with inserts than with dh casing tires as far as tears/cuts from rocks.
  • + 1
 @gnarnaimo: yeah you’re the only one who says that. General consensus is that dh tyres are better damped because they’re obviously designed to be and if they’re not puncturing why change and how fast the roll depends on pressure, compound, pattern and shape mainly. Sidewalk thickness doesn’t matter that much.
  • + 1
 @thenotoriousmic: The cushcore provides the dampening. Without the cushcore I would agree the dh casing tire would provide better dampening, but at the cost of rolling resistance. Again, to each their own.
  • + 98
 Air aint dead
  • - 12
flag WAKIdesigns (Mar 27, 2019 at 5:02) (Below Threshold)
 Not Yet. Soon we will be like Venus because of carbon bike parts
  • + 1
 @WAKIdesigns: chill down wacky it's only causing ocean levels to rise. The carbon goes into the ocean not the air.
  • + 7
 I want pure hydrogen in my tires for more air time. Helium is so last century. Don't get me started on regular air.
  • + 1
 @oldtech: In the distant future earth will most probably experience a runaway greenhouse effect due to the sun getting warmer. If we match Venus we would need 1300 psi in the tires just to equalize air pressure.
  • - 6
flag WAKIdesigns (Mar 27, 2019 at 7:23) (Below Threshold)
 @Konyp: well, in trillions of trillions of trillions of trillions (repat trillion times) last photon of light will disappear due to phenomenon called cold death of universe - why don't we take lots of different kinds of blow, a bunch of male hookers and die tonight feeling happy, immortal and eternal?

As to the sun, don't be ridiculous - we can either harvest hydrogen form the sun and turn it into a red dwarf, then move the Earth closer to it. Also we will be possibly living in a Dyson Swarm by then. I will hang out in Pinkbike star canteen as a cybernetic form of troll.
  • + 1
 @Konyp: I don't think you're tires would efficiently rollover objects at that PSI
  • + 2
 @oldtech: I can also imagine several other issues that could hamper ride enjoyment aside from poor rollover.
  • + 1
 bwaaaha
  • + 5
 To air is human
  • + 1
 Eff air. Ya need nitrogen in yer rubber. Coz thats what all the F1 teams run. Hurr hurr.
  • + 1
 @Tjomball: It might actually make sense if temperatures change a lot. Like when riding down the Megavalance (3300 to 700m something).
  • + 86
 Why use air when there is the opportunity for more plastic!?
  • + 27
 Just fill your tyres up with hay
  • + 6
 But if you’re gonna use a tire insert anyway, this is not much worse, and you get rid of the latex “milk”...
  • - 10
flag HairyLegs (Mar 27, 2019 at 5:24) (Below Threshold)
 @brodoyouevenbike: BUT you don't want to get the vegans up in arms by the way you are miss treating the hay!
  • + 2
 What about plant cellulose foam?
  • + 3
 EPP and ETPU are fully recyclable but why do any research when lazy and snarky are so much fun
  • + 0
 My gut tells me the market for these will be more like city rental bikes than actual MTB. It would reduce the maintenance of tires. And since most cities consider those bike programs as a green initiative they'll just ignore the plastic, spout some stat about all the cars not on the road because of the city bike program and exalt in the net reduction of greenhouse gasses (which I highly doubt is actually net positive).
  • + 5
 @dirtstar59: able to be recycled and having local facilities to recycle makes so many “recyclable” items non-recyclable
  • + 1
 @dirtstar59: if some one is not going to do research they most likely will not be recycling
  • + 2
 @brncr6: so yeah, it's recyclable. It still has an end of life. Many people still do not recycle. It's an innovation that adds considerably less value than its potential long term cost, of which what it is trying to replace has incredibly low downside from pretty much every perspective.

Maybe instead of just researching as @dirtstar59 suggest, might I also suggest critical thinking?
  • + 57
 505g, seriously? I mean, for this weight penalty, you could also run the strongest DH-oriented tyres and never experience a puncture. It will cost half the price of this thing and last way longer, while allowing you to change the pressure on the fly without having to dismantle this whole apparatus.
I definitely do not dig inserts.
  • + 60
 Very true. I feel like foam lobbyists have somehow infiltrated the mountain bike industry. It's like when pomegranates were supposed to be some sort of magical fruit, and it was all pomegranate everything for a year or so at the grocery store.
  • + 4
 something a lot of have known since way before the tyre insert craze started
  • + 3
 Ah the good Intense DH tires- those were nice patk tires
  • + 10
 @mikekazimer: Pomegranates forever!
  • + 3
 @mikekazimer: The pom mafia will be paying you a visit shortly, meesta kazimer...
  • + 12
 @bbeak: did you know that Pomegranates is actually an anagram of "grease tampon" , that's why I'll no be eatin them...
  • + 1
 @NotNamed: Those were indestructible... still riding on a set from 2005. They must have thousands of miles on them and still look pretty decent.
  • + 1
 I think back in the days I was running Kenda DH tubes that were 650g each. And I'm talking 26" here. Now you know why people would run 24" in the back...
  • + 0
 The bloody tube in a 29 x 2.8 is 400 grams.
  • + 0
 @mikekazimer: the obvious question is what do these weigh compared to Huck Norris and inserts like that. If it is not much more, then I guarantee that you will see them in WC and EWS (provided the ride is as good with air). And once word gets out, then everyone will want them because everyone thinks they need what pros need.
  • + 2
 It is not all about flats. There could be a performance difference with tires not folding over in corners, less burping, and maintaining the structure of the tire so the knobs grip better. However, the weight penalty for someone who pedals their bike is prohibitive. Perhaps for DH it would make more sense.
  • + 5
 I understand the sentiment of this product being useless, but consider the arguments:
→people want more grip and lower tire pressures
→people spend $150 for cushcore (as an example)
→cushcore still gets flats
→cushcore needs sealant
→this product has allegedly similar characteristics to low air pressure
→this product has about 0% chance of a flat (although probably some other problems)
→this product is cheaper than competitor options? (apples 2 apples, not moar air 2 squish plastic)
→this product needs no sealant
→set and forget
These are some serious considerations. Would I personally run this tech? Maybe—I'm a low-price, moar air person. You can bet I want to try it though. For the people who like the benefits of a cushcore, procore, etc. this is definitely on the table.
  • + 1
 Spray foam inside frienemy's tires for laughs.
  • + 43
 Why don't people just go back to dual ply tyres? Seems f*cking daft to get thin walled, shitty, light tyres and then adding half a kilo to make them useful.
  • + 33
 And all the foam in the world still doesn’t prevent ripped sidewalls.
  • + 10
 @mikekazimer: No insert prevents against ripped sidewalls. 2020 will be the year of the outserts. It will make your precious tires last forever. Then, by 2025, people will forego the tire just like most now don't run a tube. But yeah, by 2025 people will run the insert directly inside the outsert.
  • + 2
 @vinay: but the the tire still rolls, the insert doesn’t care...as long as it stays on the rim.....
  • + 2
 @mikekazimer: wouldn't foam make it easier to rip a side wall as the rock doing the cutting has a firm surface to press against?
  • + 3
 @mikekazimer: There seems to be a difference with this one. I'd bet that even if you ripped a quarter of a sidewall from the bead mid-ride you'd be able to ride it home no problem.
  • + 1
 @mikekazimer: right, only good riding technique can prevent that! :-)
  • + 1
 Running inserts in full dh tires is the way to go. At least for downhill racing.
  • + 2
 @bigburd: Nope, it is emulating the pressure of an air system. It will help to prevent your rim being smashed though.
  • + 1
 I'm waiting for mountain tubulars where the tire and foam insert like this one are one piece. Glue it on, forget about everything and never get a flat ever. It might even be cheaper.
  • + 2
 @A-HIGHLY-EDUCATED-PROFESSIONAL: I think that might be where we're headed. Completely eliminate the problem of bent flanges and flat tires all together by just ditching the flanges and air!
  • + 29
 Plastic goes into landfills or in The ocean. All those discussions and then we have nothing better to do then introducing More plastic to a system that is actually working quite well for me at least. Just my thoughts.
  • + 3
 Yeah tubeless tires are amaze balls
  • + 16
 So I want my air shock and fork to feel as good as a coil and my styrofoam wheels to feel as good as air.
  • + 13
 I stuff my tires with SHIT (SHeep's Intricate Tech fiber) and that thing just glides over every little rock and keeps my rims warm and fuzzy.
Doesn't absorb much sealant either.
  • + 2
 You sir, have a point
  • + 4
 yeah, but you only go fast because you are being chased by a bunch of randy billy goats who think your tires are their next good time..
  • + 1
 Corn will help with rebound characteristics.
  • + 4
 You can't pull the wool over my eyelets.
  • + 6
 IMO this is where manufacturers such as Mavic or e13 could shine, because they develop both the wheelset and the tires. They could develop exactly the right foam for their rim widths and shapes, and their tire sizes. And of course, if you put a 500gr foam that fits perfectly the tire, you can create a tire moderately light, the damping being all taking care of by the foam.
I don’t know, it sounds good in my head Smile
  • + 3
 yup sounds good to me too. Like the pressure emulation too. We don't all weight 85kg.....
  • + 2
 Or even completely rethink the whole system. If you're designing it from the ground up, you could abandon clincher rims all together!
  • + 1
 MAVIC has already tried that. Le Systeme if I recall correctly. They used some kind of mousse with a three month shelflife. Needless to say it was not a viable option for anyone but the pros. But it was the beginning of what became UST.
  • + 6
 I think I get it...and I also dont.

A moto enduro bike would run a super heavy tire, along with a tire mousse, not either or. So I understand the desire for people to mess around with this idea, but I just dont think it holds up in mountain biking, for cost, weight, and maintenence. You need an actual throttle, a powerful motor, and generally way more rugged conditions to reap the benefits here. Like some have said, why not just get dual ply dh tires? 29x2.5 DHF WT-dh casing tires, front and rear all day. how much rubber? ALL the rubber.

As with all things, look to the highest level pros to see what actually has staying power. I think we can guess exactly zero world cup riders, in any discipline, will run a fully non-pneumatic tire any time soon, but who knows?
  • + 1
 You can run a mousse without a tube! I guess by the tire size they are marketing it at (2.Cool it will be for ebikes. Then grandma and grandpa will never have to worry about repairing a flat on their jaunts! But if electric motor technology keeps going the way its going, and people start riding ebikes like mini enduro motos, there will be a market.
  • + 5
 You re right. Air time is done. I fill my tires with grass. Much more flexible than any plastic insert. There is always grass near the track, so I can take the grass pressure up or down how I want. And it is free!
  • + 7
 Christ on a bike! When will the madness end?
I’ll just stick with my old school inner tubes
  • + 18
 told some one I was running "old school inflate'a'ble tyre inserts"
took him a while for the penny to drop Big Grin
  • + 4
 @nojzilla: duck tape and a pile of tubes that how to ride bmx
  • + 1
 I'm a super late adopter of innovations (I still have Avid BB7s), but tubes can do one. The last time I used one I put literally 10 holes in it in one go. I counted. It wasn't a heavy tube but I wouldn't have wanted to climb with anything heavier. I was puncture king until I went tubeless.
  • + 3
 @BenPea: Throw your BB7 on a snow bike and get Hydros no more OTB's
  • + 5
 @lake-st: I like the on-off feel. I'm on the bike, I brake, I'm off the bike. Might get some XTs one day, but I don't think I'll enjoy hydro fade.
  • + 2
 Not madness, its progress. Inner tubes are cross linked rubber and very hard to recycle. Get with the program man. ha
  • + 1
 Xc 1.9 tubes with dh tyres are a good combination.
  • + 2
 @Nickvivian: Tire sealant is also pretty hard to recycle.
  • + 1
 Which weighs 380 grams for a 29 x 2.8.
  • + 1
 @thenotoriousmic: I refer you to my post about the 10 holes.
  • + 4
 I thought Yoann Barelli already solved the "flat tire" problem with his amazing invention... "La Baguette" ???!!!!

www.pinkbike.com/news/yoann-barelli-announces-la-baguette-a-revolutionary-tire-insert.html
  • + 3
 'Flat proof system'.....In 4.5 years I've had one flat while riding tubeless because I hadn't put sealant in for 6 months. I live in the land of cactus and goatheads. Back before tubeless and fancy sealants, many people put thorn-proof tube or even an old tire with bead removed inside of the other tire. I'd say tubeless is pretty much the accepted standard on bikes, cars, motorcycles....Maybe this technology isn't for flat-proof but for recreational riders that don't ever want to pump up their tires. I think it is cool but not really solving any problems.
  • + 8
 No.
  • + 3
 I mean why not, on my MX/Enduro Bike im using Tire Mouse because otherwise I wouldn't be able to ride with such low Tire "Pressure". I would say that on a Downhill Bike it would absolutely make sense to me to use something like this.
  • + 3
 yup, Not just rim protection, but also actually keeping you riding no matter what. nice
  • + 3
 And yet this system will still need a valve, and rely on air to set them up. No tire is going to seat on a rim without pressure. There is no way these inserts will magically pop a tire onto the rim. And holy Mary mother of Christ these things mist be hard to install.
  • + 3
 You have a valve in your tire before install. It is removed as a part of the process. Then we put a pretty Air Fom sticker to cover the valve hole when install is done. Takes about 10 minutes for a set. Install at your local IBD who needs your business and support!
  • + 1
 @Nickvivian: that makes no sense.

How do you make the tire seat on the rim tire bead seat?

Explain please.
  • + 2
 @Nickvivian: do you have some sort of proprietary valve that can be pulled out without breaking the bead seal? Which means you can out it in after the tire is on the rim, and pull it out without from the outside and not the inside of the rim - meaning you don't break the bead seal.

As soon as you break the bead seal, you need to air up to bump the bead back on the shoulder of the rim.
  • + 4
 Seems like a good product but weight and material (plastic) is a massive con.

You would be better off just running hardcore DH tubeless tyres
  • + 6
 I think it would be brilliant for a city bike
  • + 2
 Yes, that is the target air-fom.com
  • + 5
 To never have a puncture again I would pay that if it feels like the 30psi of air I currently run
  • + 2
 Sorry Guys, but the Air Fom product is NOT a "high-end option for performance bikes" as the author wrote. He must have misunderstood. It is for commuters, bike share and e-bike everyday users who need to make sure they get from A to B and back again every day without fail. It is however fully recyclable, gives amazing performance at low temperatures (Which tubes do not) and is very close to the same weight as tubes would be. Thanks
  • + 1
 Cant imagine installing this. Takes insane amounts of effort to put in cush core and that is only about 1/3 the volume of the tire and this monstrosity takes up the whole tire. I think that your better off buying the solid cruiser tires they make for your step moms town bike.
  • + 1
 I'm pretty sure ditching air is the future, but I don't think it will actually work until someone rethinks the whole system. Maybe something like a combined tire/insert and bolt on rim flanges for easy installation... Who knows!
  • + 1
 No! Pneumatics are about spreading the load from the footprint, across the air in the whole tyre! like putting run-flats on a car. I cant be sure without a test, but I predict it will ride like a bag of ass. It will also wear out!
  • + 1
 Tannus sucks. It is really heavy, shitty install. This Air Fom product has different pressure emulations. But people these are NOT for competition. They are for all of the people who ride their commuter bikes and e-bikes every day and need to get to work and back with no hassle. And they work
  • + 2
 Why would commuters want to mimic 22 psi!?
  • + 1
 @gnarnaimo: the urban product mimic 65 psi....
  • + 2
 @dirtstar59: "They are for all of the people who ride their commuter bikes and e-bikes every day and need to get to work and back with no hassle. And they work" So what about the 22 psi model?
  • + 2
 @gnarnaimo: actually they are targeted to bike park rentals and e bike MTB at this time from what I understand, not performance riders, Mike left that part out....
  • + 2
 IDK, I have Tannus on my commuter bike and its awesome. Once I got past the break in period (40 miles) it was awesome. And I hear the new DH stuff they're coming out with is pretty rad. I'd be game to give it a try.
  • + 5
 @dirtstar59: Hi Mark from Air Fōm, bike park rentals and e-MTBs aren't for performance riders? It seems like our wires got crossed a bit because while it's clearly a viable product for commuters and bike share programs, I left with the impression that your goal was to also offer a performance product.
  • + 1
 @mikelevy: From what I know of the product and several conversations I've had with Mark and his team, the distinction to be made is "people who race competitively (UCI DH, EWS, etc)" - these are not the intended customers for this product and the term "performance" applies to this subset of the cycling world. Conversely, people who ride hard, and/or ride for enjoyment (vs. a paycheck), people who aren't hyper-sensitive to weight, and people who want to maximize time spent on the bike are who this is for. Bike commuters, share bikers, gravel grinders, and yes, your average garden variety mountain bikers (both with and without pedal assist).
  • + 1
 I would try it but I don't think I would like it because of the weight and the installation. 10 minutes you say? Show me the entire video then and without a press. Also mimic 22-25 psi means a f*cked up rim for me. I also would love to test it just to prove that there is no thing who is indestructible especially when I use it.
  • + 1
 In the RC car offroad racing world, foams are a staple and fill out tires well. However, as I recall they were junk and deformed after about 3 days of hard racing. Granted those were faster speeds and all that but same deal. Unnecessary. Fill your tire with air, add some sealant and call it a day. Too heavy, pain to install, and just more shit to buy.
  • + 1
 Has anyone tried this as part of the tyre before? for me that would be much more desirable, then the tyre could be tuned to suit the foam and not air, could probably be much lighter and the foam will fit the tyre perfectly, would be easier to install too.
  • + 5
 Let's just get solid rubber tires released and be done with it, already...
  • + 1
 Solid Rubber Tires fall off.....they have no pressure emulation, and their drip sucks. That's why you need to keep your lovely outer tire, but replace the weakest link with something that keeps you on the road at the right pressure like Air Fom.
  • + 3
 I maybe would like to try it, but I wish it would be heavier and more expensive. Air is overated.
  • + 2
 thing is, we all have different body weights an preferred tyre 'pressure' ,an we all know tyre manufacturers cant settle on a width measurement..........
  • + 1
 Just run a nokian gazzaloddi. They're so thick that even if you somehow find something to puncture it, you probably could run it without air without too much of a difference in rolling resistance
  • + 1
 I can't wait until stuff like this is super cheap. For the time being, foam inserts are expensive, mostly because these are companies that need to keep their lights on. But in a few years stuff like this will get CHEAP
  • + 3
 How quickly after hitting the jagged rock does this fancy foam take to regain its shape?
  • + 2
 It only takes ∞ sec
  • + 3
 Ah the annual no more air entry into the market.
  • + 2
 more petrol, more plastic, more pollution..................for a "green" sport..............
  • + 2
 I'd like to see the tire installation video, AirFom guys want to post a link?
  • + 1
 Unless it weighs less than air and I can adjust its malleability, I’m out.
Good thought though. Keep working on it.

...and thaaaaat’s the way the news goes!
  • + 1
 This seems like the stupidest thing to me. Just go ahead and make a solid tire that deforms and skip the whole foam thing altogether.
  • + 1
 Damn...I have yet to have any need for a replacement of my tubeless setup. What the hell are people riding over where this is such an issue today? f*cking razor blades???
  • + 1
 Nope. I don't like the price and I don't like the environmental baggage these carry with them. I also doubt they work as well as air.
  • + 3
 I'd use it on a commuter bike
  • + 3
 Yup, but then you would also no longer be able to say you had a flat tire and that was why you were late, as these are very reliable indeed.
  • + 2
 EPP and ETPU are fully recyclable. Do the research. These could work for rentals and E MTB ....
  • + 1
 Yes, quite right. Current tubes cannot be recycled, thats the problem.
  • + 1
 I don’t get it. How do you get it inside the tire? And how does it provide enough pressure to hold the tire bead on the rim.
  • + 1
 The air in my tubeless tires weights a little bit less than this plastic garbage
  • + 3
 It's almost April.
  • + 1
 Yes, so don't be fooled by Tannus.....(with the silent "t")
  • + 3
 Give me Cushcore
  • + 2
 And luckily plastic weighs far more less then air...
  • + 2
 The price seems a little inflated
  • + 1
 That's basically a vittoria airliner which, by the way, feels like cement in your tire. I'll take a huck norris instead.
  • + 1
 Free Air + an arm workout... Win-Win! All day long. No pool noodle for me.
  • + 1
 Will throw in my GF's bike she never rides so that I never have to inflate her tires.
  • + 1
 Pair this insert with that weird tire with the zip on tread.... Good to go!
  • + 1
 I want to see the engineer mount one before it gets any legitimate hype. Tires are tight enough when they are empty...
  • + 3
 stop plastic please.
  • + 2
 expecting one piece combo of tire, rim, spokes and hub soon..
  • + 2
 bad idea. It is like head and shoulders shampoo or body wash and shampoo together, sounds nice, but does everything badly. Tires and rims / spokes are not the same tech, cant see anyone investing in that. After all, once you have spent 5 years building the damn product, some hippie will ask why it doesn't come in pink....
  • + 1
 @Nickvivian: yeah I know, it was a joke
  • + 2
 The ultimate tire filler will end up being dog poop...and it will sell...
  • + 0
 WHAT, YOU'RE TRYING TO REPLACE AIR?? THE LEGENDARY ACHILLES HEEL OF MTB? NOOO, I WILL NOT ALLOW IT.

I WANT TO PUNCTURE, IT'S FREE AND I LOVE IT.
  • + 0
 These are recyclable (Unlike tubes (you terrible polluters you)) and the weight is almost the same as the tubes would have been. Sounds great to me. GREEN & LEAN.
  • + 2
 Pretty sure these are for commuter bikes not mountain bikes.
  • + 2
 Sounds like a product for citi ebike share schemes.
  • + 2
 yes, exactly. Gets you there and back every day. Ride on
  • + 2
 You guys never heard of bib mousses?
  • + 1
 This is airing too much to the side of foam...
  • + 1
 I cannot see these being easy to install...
  • + 1
 I thought April Fool’s Day was next week!
  • + 1
 Not all parts should be modified..
  • + 1
 Can we just agree to stop making EVERYTHING out of polystyrene?
  • + 1
 I like to call this a solution looking for a problem
  • + 1
 These will roll slower due to greater weight and hysteretic losses.
  • + 2
 They have different densities and hardly any weight difference. These are not for performance bikes they are for average Joe who needs to get somewhere reliably every time.
  • + 1
 great, more foam in the landfill.
  • + 2
 Yep...
  • + 1
 Hahahahahahahahahahahahahahahahahahahahaha!
  • + 1
 Really?? It's not April 1st yet!
  • + 1
 Is it 1930 again? When we had solid tires? Lol
  • + 1
 go "plastic" yourself !!!
  • + 2
 Better than "rubbering" yourself, at least this is recyclable.
  • + 1
 *Ctrl-F* -> 'grams'

LOL!
  • + 0
 You asked for pool noodles, here ya go! It’s pretty clever! Would I buy it, air is still free!
  • + 1
 Oh yeah, this world needed more plastic !
  • + 1
 If it ain't broke don't fix it
  • + 1
 Do these tube noodles help with water crossings...?
  • + 1
 April's fools???...No...just no!
  • + 1
 Moving forward, I think I'll be skipping any coverage from Taipei.
  • + 0
 Worse than that SC chameleon x Supreme for sure.
  • + 0
 No. It's a product for suckers and suckers only.
  • + 0
 Tube 300 grams Sealant in tube 50 grams.
  • + 0
 #Taipeinonsense
  • + 0
 "Get off my lawn"
  • + 0
 Uuuuuummmm... NO!!
  • + 0
 wtf? srsly?

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