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Stemtee's World Cup Winning €4,000 Shock

Jun 19, 2017
by Paul Aston  
StemTee s custom shock

Why would you take the time to build your own shock when there are plenty of great options on the market? Well, it was clear to see after talking to World Cup MTB mechanic to the stars, Hugues Postic, the main reason he has done this… because he bloody loves it.

Hugues has previously wrenched for Fabien Barel, Damien Spagnolo, Morganne Charre, and currently, tends to the needs of World Cup winner Alex Fayolle. Living close to La Clusaz in the French Alps, he has access to plenty of serious downhill on his doorstep, as well as the high-tech engineering vicinities around Annecy and Cluses.

StemTee s custom shock

bigquotesHaving my own shock makes it easier for me to setup, adjust, and to have better damping and control than other products out there. It's difficult to explain, but there are different ways of doing things.Hugues Postic

The Polygon UR team has moved to SR Suntour suspension for 2017, the Rux downhill fork is poised on the front of their race bikes, but a downhill racing shock is currently being prototyped. The team is free to use any rear shock they choose this year. Ohlins is the current choice of the team riders, though Mick Hannah did race on a prototype SR Suntour air shock this weekend in Les Gets. Alex Fayolle, on the other hand, has something particularly special. Some say he only won at Lourdes due to the rain, he and his mechanic have some serious speed and technology up their sleeves.

StemTee s custom shock
The huge shock makes the most of the small space available on the Polygon Collosus.

bigquotesIt's hard to explain what the differences are between my shock and the others, mainly this unit is made purely for racing, not for production. It's made specifically to work with this Polygon bike, Alex Fayolle, and race tracks. The other companies have a difficult time trying to make one shock that can work with every bike on the market, they have contracts, objectives, and pricing to consider. Me, I only have the passion for winning races, it's not the same challenge at all.Hugues Postic

StemTee s custom shock
There's a lot going in that 'piggy back.' It's more like back, ribs, belly, and cheek that cost the best part of €3,000 to machine from one lump of metal.

All the changes are made inside the shock. There are no adjusters, just shims, valves and 'taps' to change the flow. Inside the main chamber, there is an oil-filled bladder and air pressure around its exterior, inflated between 100 and 200 psi. There are high and low-speed compression and rebound control in the main body, but there is also a high and 'middle' speed control in the central portion of the piggyback.

StemTee s custom shock
Hugues didn't just jump on the lockout bandwagon at Fort William. His previous version of this shock had a similar system last year.
StemTee s custom shock
Spending the money where it counts; four figures for a shock, but a cheap left-hand gear shifter gets the job done.

StemTee s custom shock
The shock may look like a monster but only weighs around 40 grams more than a Fox DHX2 coil.

The hydraulic lockout controls the low-speed compression and is set differently for each track dependant upon how extreme they need the lock out to be. We have seen an influx of shock lockout levers at recent downhill races in anticipation of the monster sprint at the end of the Cairns World Championship track, which will be a pedal to the medals in September. But, Hughes was running a lockout on his previous version of this shock at World Cups during 2016.

The shock uses a spherical bearing at the lower eyelet for a number of reasons: it helps to protect the shock shaft from side loads, reduces rotational friction and friction on the shaft, thirdly it allows the shaft and the coil spring to rotate slightly to negate coil bind. Coil bind is when the spring wants to rotate and twist as it is compressed.

StemTee s custom shock
StemTee s custom shock

Hugues designed the shock himself, and his friend, local rider, and owner of Aravis Précision built the units. Marc Genans runs the engineering firm and makes short production and prototype parts for Moto GP teams.

The CNC body could take a few more passes from the cutting blades, but they left the machining rough to keep costs down. Relatively down, as the body cost €3,000. All the internals including the shims and super-expensive seals come to around €1,000, and they currently have four shocks for testing. Hugues hopes that by the time Crankworx Whistler kicks off, the whole team will be racing his pride and joy.

StemTee s custom shock
We caught up with Hugues while he was packing up the team truck. This is the test mule they use for data acquisition. Compared to engineering the shocks, the system was a snip at €8,000.

The data acquisition was bought from and Italian brand who supplies Moto GP racing teams. It can record the suspension travel and speeds, various forces, wheel speeds and braking pressure. It also works in conjunction with GPS.

bigquotesIt's a very important tool for the mechanic to check if things are working correctly, and when it is hard to understand the rider's feelings. Sometimes the rider feels the bike is too soft in a particular corner, for example, but he can't work out if it is the front, the rear, compression or rebound or whatever that makes it feel that way. It is also useful for the rider to check what they are doing on the course, to see where and how much he is braking, if he loses speed from drifting or mistiming things. It's not very difficult to analyze, it just takes a lot of time and the system has some problems staying in one-piece under the demands of the downhill mountain biking.Hugues Postic

StemTee s custom shock
This sensor records brake pressure and time spent on the anchors. They have measured up to 60bar/870psi!
StemTee s custom shock
This GPS tracker allows the team to analyze exactly when, and where, on the track time was being lost or gained.

StemTee s custom shock
Two passionate guys who simply love mountain bikes and racing. Marc Genans on the left and Hugues Postic on the right.

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  • 241 10
 Imagine it also has device to start rain storms.
  • 220 4
 It has undisclosed damp(en)ing technology...
  • 206 11
 I don't know if I can trust anyone wearing Crocs...
  • 62 5
  • 18 7
 @R4Squares: Endu-rocs
  • 35 96
flag MrDiamondDave (Jun 19, 2017 at 12:24) (Below Threshold)
 DUDE Crocs are so awesome, I wear them to your mom's house and it makes getting to the "hanky panky" much faster, more Enduro
  • 51 12
 Eddie Masters loves crocs. You just insulted a God. Pay attention
  • 6 2
 Respect the crocs! follow us @inmycrocs
  • 15 9
 @RedBurn: I love Crocs I really do wear them to the trail head everytime i ride!!!!!!!! Suck it
  • 24 50
flag MrDiamondDave (Jun 19, 2017 at 13:04) (Below Threshold)
 @McCarns: Just seems like to many people don't have a sense of humor I think they feel their "safe space" has been violated Smile People get their panties if a wad..... Jebus
  • 24 12
 Plastic shoes for lazy bastards and peasants
  • 13 6
 Crocs and socks.... ugh!
  • 37 3
 @Earthmotherfu: and for hygienic, hardworking, underpaid medical staff?
  • 15 13
 @MrDiamondDave: the world of PB. Everyone in the online world expects their needs to be satisfied and their opinions to be catered too. You have the right of freedom of speech and expression. Say what you want. It's your right. The whole world has became gutless and too worried about being politically correct. Sheeple everywhere.
  • 17 2
 Funny how a comment about Crocs can lead to discussions about safe spaces and freedom of speech
  • 3 2
 @Jack-McLovin: only on PB
  • 15 2
 @properp: that's not true. people are stupid everywhere. not just on here.
  • 5 0
 With socks no less...ironically cool?
  • 5 1
 Crocs are common with legit race mechanics that don't want to hang around with soggy shoes after constantly washing bikes to keep sponsors happy.
  • 7 0
 Currently wearing Crocs'n'socks, without shame... best attire for surfing Pinkbike comments.
  • 5 0
 @tclaridge: Same here. Official basement attire.
  • 6 0
 But two Crocs do make a right
  • 19 0
 They're like contraceptives you can wear on your feet
  • 5 2
 Dude... I have the same crocs for maybe 15 years?? After trekking all day working as a guide in Torres del Paine, Patagonia.. it was the best thing with a beer or wine. I don't get where or why there is jokes of contraceptive?? or against them.. I dont use at the city or everyday just in the outdoors.

And why you notice that in a hand made shock??? wtf??
  • 3 0
 @MrDiamondDave: lots of people have a great sense of humour. Lots of people also think "your mom" jokes stopped being funny when the jerky boys stopped putting out tapes.
  • 3 6
 @VwHarman: your mom jokes never get old, or "that's what she said" jokes. I give Zero Phucks
  • 3 0
 @MrDiamondDave: if you give zero f*cks then make the joke and move on. Don't act like a wounded bird when all of pinkbike doesn't laugh at your attempt at humour. I love you people who complain that someone is too sensitive when they dont agree with you. Maybe they just don't agree?
  • 2 0
 @VwHarman: last word merchant.
  • 73 0
 Hell yeah, thanks for doing this article, was very intereted to learn more about this and full props to Postic for going for it, doing something different, and dropping the cash.
  • 2 1
  • 51 7
 Just to nitpick... the spherical bearing does nothing to protect the shock from side or axial loads. It just allows the end of the shock to rotate and reduce shear/bending forces on the shaft from side loads.

There's an reason eng. students are no fun at parties.
  • 20 3
 Let's nitpick together and have a party. If both ends have spherical bearing, you can't introduce side loads into the shock. It will just swivel out of the way. Therefore the shock will be subject to axial compressive loads exclusively (or tensile loads when you pick up the bike).
  • 13 0
 Seconded. On both the forces involved and the no fun at parties. . .
  • 6 3
 I agree that a spherical bearing at both ends will greatly reduce shock wear, while having one only at one end will only eliminate certain types of sideloading. However with a spherical bearing at each end, the shock will be free to rotate left and right a little. Although this isnt a huge issue unless the piggyback chamber contacts something, its at least mildly annoying and I suppose may wear the bearings prematurely. I also find myself thinking spherical bearings at both ends may introduce a twisting force on the frame when the shock is compressed. I'm not sure how much real world effect this would have, but on a frame that is slightly misaligned already i can imagine it being an issue. And thank god for kitchens at parties. Or at a really good party, a garage.
  • 5 1
 I'm no engineer but I can be a total bore at parties. Is JamesJozef right when there is only one spherical bearing? It seems like if both ends had spherical bearings, the shock could get oddly positioned and actually bind up more?
  • 14 2
 Actually I'm an engineering teacher but I didn't read the article properly. I thought there were spherical bearings on both ends as I've seen until now. In this case, yes the shock will be loaded by an constant side force. But that isn't what does most harm to the internals. The bending moment does. And because there is a spherical bearing on one side, the bending moment linearly increases from zero (where the spherical bearing is) to the max value at the other end. It is still much better than not having spherical bearings at all though, but it also depends on the suspension design. This stuff is hard to explain without graphics but I'll give it a shot. If you apply a force and/or moment on something, it deforms. Always, could be a tiny bit but there is always some deformation. If you have a single pivot design like some full suspension bike by Orange (except for that ST4 then) and you corner or land sideways, the swingarm is going to bend sideways and as a consequence the shock mount moves along. This always happens and in the case of that single pivot design, the shock mount rotates in the direction it moves. So the shock is forced to make an awkward S-bend.

As for the shock being in an awkward position, no that doesn't matter as long as it is being loaded axially as mentioned above. It starts to bind when the bending moment is being introduced and as such is being used as a structural member. Of course most suspension forks are being subject to bending and they do fine. But they bind less if they deform less.

TLBig Grin R: @JamesJozef is correct. He is correct too that the bending moment is reduced and that is actually a much bigger advantage than not having sideloads.
  • 3 0
 My '12 Scott Genius 10 has sphericals in both eyelets. Being my first bike, I was surprised later that this is not common practice. Assuming the relevant pivot points are perfectly inline/square is asking a bit much. Some bikes do have non-axial loading issues. Most recently I have read complaints about Transition Patrols having this issue, but those may have been early builds.
  • 1 0
 @vinay: well written. A ball bushing is self self aligning, and in industry on many large shafts with serious loads on the end( pistons, fans, hammers, offset loads, etc) come with self aligning double row spherical bearings or ball bushings because of bending of the shaft. Even on a ten or twelve inch alloy steel shaft bends enough to crater a bearing. Most hydraulic rams come with ball bushings on either end when installed on moving equipment. Go check out a dozer or backhoe.
That being said, i own an uzzi and that rear end flexes like a hot little yoga student, i would go for the upgrade for sure. Though for spring twist/ binding, i made a thrust bearing that slides on my fox dhx, soo plush ill never go back!
Gotta love technology
  • 40 3
 I dont know if my wallet could rebound from a that purchase.
  • 18 3
 This is like any top level sport, I know I'll never have a F1 race car, or the motor that goes in it, etc.... It's cool to see the MTB sport really take all the technology available and use it to get the most performance.
  • 6 4
 No need to damp(en) the mood....
  • 9 0
 My bank account would bottom out
  • 5 1
 Would probably have to fork over a good bit of cash anyways
  • 1 1
 @MrDiamondDave: I remember an interview with UR Polygon owner/manager. He was saying that MTB DH WC is quite 'awkward' as a top level series. All the equipment the teams run can be purchased of the shelf sooner or later (not mantioning the cost here) whereas in F1 or MotoGP the teams run one of parts most of the time. He was really happy to co-operate with Polygon who are willing to make bikes specific for the team and himself.

Think, this mindset has driven him to run the Trickstuff brakes and BOX shifters. And now this custom shocks...
  • 12 5
 @szusz: I came to think that "MTB is so undeveloped" is an opinion that isn't thought through enough. There is simply no money in MTB so there is very little return in developing "off the shelf" stuff unlike automotive and moto industries. You get own satisfaction, that's it. And what do you get? people whine that they need to spend 5k per bike, how much fkng pathetic whining there has been lately that privateers cannot compete with Syndicate's 29er?!

If you make a custom shock for a rally car, you can charge more than 2k per unit. Rally car needs 4, often wrecking at least one per rally. Then there are plenty of amateur folks with real cash, I mean REAL cash, who buy this stuff for their Lancers, Imprezas ST, GTRs and what not. Do you hear them whine that Impreza WRC is so fkng expensive, it costs 250k and they are poor poor cry boys for owning Impreza STi for 36k? And look at the volume of investments of car/moto companies into this sht? Volume of investment of all sorts of companies into advertising on cars or motos. Uncomparable on every freaking level. Do you think support cars are there in Tour De France to help racers in the first place? No, they are fkng driving commercial signs no1, rider support no2. Once you start looking at any sport through glasses of capital investment with expected return, things get clearer.

Mountain bikes are bikes, I mean bicycles. As some journalist wrote lately, comparisons between Downhill and Forumla 1 do damage to the sport, or rather a poor fkr who is getting unnecessarily emotional about sht that does not matter at all - why? because a well setup YT Tues gives you pretty much exactly same chance to win as V10cc on Enve... or rather same chance to stack up wherever you stack up.

So guy at Ur can stack up his nose as much as he wants and say that MTB is ridiculous for being so non professional. he should know his place better.
  • 1 1
 and then there's the whole business of race performance sub-brands in automotive land - they don't give a rip about selling units
AMG & Mercedes. ///M & BMW. Holden & HSV (not really same league) Mini & John Cooper Works. NISMO & Nissan. STi, TRD, even Fiat has Abarth and is it "N" for Hyundai??

RS have Blackbox, we could see more and more race only products
  • 6 3
 @WasabiJim: V10c and V10cc is like Mercedes and AMG, that is still such a long way to Le Mans or F1, that if you set your sights for top racing tech and you buy yourself an AMG it's almost like you haven't even left the fkng house. All those AmG, Abarth, M series BMW, RS Audi is cool, these are sweet cars, but they do smell of impotence a bit. Get your Ford Fiesta around rally track or do a few laps in your BMW 320 on Nurburgring before you put money on some pseudo racing stuff that impresses only your friends (out of kindness), a few loaded chicks but mainly other impotent wannabies. Same is true with almost any bike component out there. The difference is, Audi RS is definitely faster than Audi A4, Specialized Status isn't much slower than SWorks Demo while difference between 200$ wheelset and 2000$ wheelset is unquantifiable
  • 1 0
 but you're talking about the gear those brands/divisions sell to punters because the parent brand knows it can move units for those reasons you mentioned. at their heart tho (and you may have to go back a few years these days) they are well funded race teams using gear that, as the thread implies, never had any intention to go on the market.
It would be awesome if MT biking got to that level where winning (or being seen winning) in itself is profitable sans a line of consumer products. the innovation would stagger, but as is all the industry's "most innovative" products have been borrowed from another sport or the office chair.
so i say good on them! what should we care about how they invest in winning
  • 1 1
 @WasabiJim: What can it cost to send an athlete and his coach to train for 2 months in off-season at altitude with access to facilities, trails then decent living and social conditions (so his testosterone levels don't drop due to depression and raw boredom) like Canary Islands? Probably 6000-7000$ - that will give him much better leverage for winning than investing this in developing some stupid sht that probably won't make much difference over a 6000-7000$ bike. This is not motorsports, not even close, human factor is the deciding factor. If you are a smart company you invest in atheletes body, not the gear which is a rather simple machine.

The dude here made a custom shock, hurray to him, too bad the bike it is mounted to runs on fcking Hutchinson tyres, some X-brand brakes and top it all: a freaking Suntour fork.
  • 28 6
 That's shockingly expensive.
  • 1 0
 Boom boom.
  • 17 0
 "due to the rain" it's still a world cup win come on pinkbike ...
  • 1 0
 The article was only quoting popular opinion, not supporting it. Having said that Fayolle hasn't broken the top 20 since his first win, so there is growing justification for that opinion.
  • 16 3
 "A spherical bearing". You mean a heim joint? Same as race cars. Go figure. And everybody called me an idiot for bringing it up years ago as a replacement for bushings...
  • 1 1
 Isn't this common then? My Magura shocks (Hugin and MX) have them. The RockShox Pearl my bike originally came with doesn't have it, but I don't know what's common with other shocks.
  • 4 1
 @vinay: Not at all. You can get a needle bearing or a bushing. No heims available for this application yet.
  • 10 0
 wrongo, it is a spherical bearing. a heim (aka rod end) has a threaded rod for adjusting length
  • 2 1
 @vinay: Which I have NO idea why they're not used. They're stronger, rebuildable, and even perform better. All we need is one small enough, and here it is.
  • 1 0
 @AZRyder: I do feel they developed a bit of play over time. A bushing is actually better for small rotations and high loads. It doesn't bother me much, but you feel it a bit when the suspension tops out (when you jump or just land).
  • 1 1
 Yes, DT Swiss has been using them for years.
  • 3 1
 Ohlins also uses them on their coil shocks.
  • 4 0
 specialized used them way back when the epic used to have the shock asymmetrically inside the rear triangle before they detached their inertia valve from the shock
  • 1 0
 actually I found one that I'm planning on installing on my bike... just need to get my eyelet machined to 16mm ID. Can't understand why it isn't done more often either.
  • 2 9
flag AZRyder (Jun 19, 2017 at 14:27) (Below Threshold)
 @bikemaster50: I'm talking about the actual pivot movement and construction. They're identical besides one being attached to a threaded rod and this one is attached to a shock. You're a dick and I hope I never run into you again.
  • 2 4
 @carsoncp64: Let me know how it turns out. I too have no idea why this hasn't been done before in a mtb suspension application.
  • 4 0
 Kids kids, take it easy now.

@bikemaster50 : It is important to be considerate with your feedback, in particular towards sensitive types. Try something along the lines of "You're definitely close. However we make a distinction between the two, namely..."

@AZRyder: Don't take it too personal, bikemaster meant it well. I'm sure if you ever run into each other you'll get on real nicely.

As for whatever names people called you back in the day when you brought up the suggestion, are you sure they disapproved of the concept? I think it was somewhat common at least. The 2004 Magura Draco and Magura Odin shocks already had them. Some DT Swiss shocks I worked on back in 2005 had them. And the 2007 Magura Hugin shock has them. They may have dropped them with their current shocks though. But as mentioned in this thread, there are/were several others around. That old Specialized Epic was from 2002 or 2003 or so?
  • 1 10
flag AZRyder (Jun 19, 2017 at 16:30) (Below Threshold)
 @vinay: In the words of bikemaster50 "wrongo". Those weren't heims. I'm talking a spherical ball joint with the ability to move in all directions, as described in the article, as to help with coil bind. The same joints on any off road coilover. It seems the mountain bike community as a whole, designers and engineers included, are looking for all of their ideas whilst having their heads placed in the same bag. Just because it wasn't designed first specifically for a mountain bike doesn't mean it won't work when scaled and retrofitted. Like your suspension? Thank the people that looked at motorcycle suspension and decided to scale it down and make it work on a bike. It's the same thing for every innovation. Go get a life outside dentistry and bicycles. You'll learn more.
  • 2 1
 @AZRyder: People responding to your initial post have been very helpful pointing you at existing bicycle shocks equipped with a spherical bearing. They have been around for a while. But mind you, they are not for all designs. Full suspension bikes like the Kona Process or Alutech ICB2.0 have the shock eyelets rotated by 90 degrees with respect to each other. This basically makes the lower shock mount perform as if it were a spherical bearing. But if the shock actually does have a spherical bearing there as well, it could actually move out of line and something (bearing or shock) will wear or break prematurely.

No one will disagree with you that the bicycle industry adopts technology from other fields. It is pretty common actually. Motorcycle technology is closely related and many bicycle component (and gear like body armour) have their roots there. Fox and Marzocchi may be the most obvious ones. Then X-Fusion has roots in Fox and DVO has roots in Marzocchi. Magura adopted Rond suspension, which were the bicycle division of WP suspension back in the day.

Then again I don't see how dentistry is involved. You tell me.
  • 2 7
flag AZRyder (Jun 20, 2017 at 1:03) (Below Threshold)
 @vinay: That in no way makes it "basically" a spherical bearing. You're ignorant and I've truly wasted my time. I hope you educate yourself next time on the subject before opening your mouth and lead somebody astray.
  • 2 0
 Years ago I had a Giant AC2... The bike was due for replacement so instead of replacing the linkage bearings I replaced them all with needles bearings just as an experiment... The difference was insane... There was almost zero friction... Got rid of the frame soon afterwards but definitely left me wondering... Never had the chance to test the durability
  • 1 1
 @AZRyder: The link that drives the shock on the frames I mentioned pivots around the horizontal axis with respect to the swingarm and around the vertical axis with respect to the shock body. The combination of these two degrees of freedom is equivalent to having a more simple single pivot design like an Orange but where the lower shock mount is a spherical bearing. Both allow two degrees of freedom of the swingarm to the lower shock mount.

As you demonstrated to have difficulties with reading properly, this means of written communication is indeed a waste of time. Then again as it is a public website, it is actually a nice medium for people to read about different views on suspension design and draw their own conclusion.

@Spark24: It could work for a while. Biggest threat for a solution like that is as the links rotate over only a small angle, only a few needles are being loaded and this is on a much smaller surface than you'd have with bushings. So over time some dents could develop in the bearing races which actually hamper the free rotation. Of course the same goes for ball and/or needle bearings in suspension links and still these are being commonly used. There are different views on that. Thing is, with suspension links you can use with fairly large bearings whereas in a shock mount, room is limited. I'm not saying it will never work, but this at least is a likely cause of failure to look out for.
  • 11 0
 All this tech and telemetry and people think making a 29er a DH bike is somehow a bigger issue.
  • 5 0
  • 1 1
 but seriously though, how do we know which is producing better results?
  • 10 3
 Sounds like a UCI violation to me (see Adam Hansen's carbon shoes as a possible problem/solution):

ARTICLE 1.3.007
“Bicycles and their accessories shall be of a type that is sold for use by anyone
practising cycling as a sport.
Any equipment in development phase and not yet available for sale (prototype)
must be subject of an authorization request to the UCI Equipment Unit before its use.
Authorization will be granted only for equipment which is in the final stage of
development and for which commercialization will take place no later than 12
months after the first use in competition. The manufacturer may request a single
prolongation of the prototype status if justified by relevant reasons.

The UCI Equipment Unit will pay particular attention to safety of the equipment which
will be submitted to it for authorization.The use of equipment designed especially
for the attainment of a particular performance (record or other) shall be not authorised.”
  • 5 2
 So that would rule out black box or any prototypes not yet on sale to the public?
  • 7 0
 Since there is no cost cap, minimum stock nor precisions about how the product must be marketed It is easy to find loopholes on the application of this rule. The shock is machined on demand and not forged in a factory in the far east. Postic and Genans could argue they are able to build and sell the same shock to anyone willing to drop some huge amount of cash. There is nothing in that rule that say you must advertize your product nor that it must be made available worldwide through distributors.
  • 2 0
 How did Honda get away with this back in the day? They definitely wouldn't sell you a bike, no matter how much you were willing to pay.
  • 1 1
 @vinay: The rule didn't exist at the time.
  • 3 1
 @opignonlibre: Pretty silly rule then, actually. If the invention gets you a crucial advantage it doesn't matter for the competition whether you can buy it next year or not, this year you're getting smoked. The way the rule is stated, it would also imply that someone rocking up with a good ol' Iron Horse Sunday is breaking rules as that bike isn't being sold (new) anymore either. And yeah, your statement is fair too but I'm not sure how this commercial stuff works. Apparently the product should be tested and approved for end consumer use. And to pass these test he'll probably have to go through some destructive testing too which he may not be ready for.
  • 2 1
 Pretty sure it only applies to road racing.
  • 1 2
 Would that rule out 29" DH bikes if they don't sell one to Joe public within the first 12 months too? So DH is not really "The F1 of Mountain biking" like a commisaire said to me haha. It's merely lacking in rulings and leadership by the UCI.
  • 4 0
 Yes it pricey but thats prototyping for you. If your doing a run of 100 shocks then all the programing/tooling/setup costs are spread and shared. Custom tuned internals in a normal shock will get you pretty close to this easy enough with the right expert to set it up.
  • 8 2
 Something, something, shock pun.
  • 7 1
 Can we just compress these puns into a few comments please..
  • 6 1
 great guy, great shock! I wish u lot of fun with this unique project!
  • 6 1
 870 psi! Damn serious pressure.
  • 5 5
 Race car drivers can stick up to 750kg of pressure into their pedals. So it just shows the forces put out and endured by what seem to be inanimate objects. They are all more heavily designed than we think!
  • 1 1
 Its not too bad. We were adapting MTB brakes for some reels and ran some tests after they weren't holding under Air Pressure (800kpa/120Psi). Mocked up a hydraulic MTB set up and were getting around the 600Psi mark, no wonder it wasn't holding the reels.
Was actually surprising to see so much pressure being applied for such a small component.
  • 5 4
 Yeah but was this shock the real reason Fayolle won the 1st round, or was it conditions? Because it hasn't done him much good since. Just saying. I mean if I can the buy winningest Fox shock for 3 times cheaper than this, what's the point.
  • 5 0
 Those holes in crocs are where your dignity leaks out
  • 2 1
 For all that time and effort and cost put into designing and manufacturing a shock does it really make that much difference on a DH track when there are so many good options already?
  • 2 1
 No, on a tight budget it would be a bad place to spend money. But the geek pride payoff is pretty big for the builder and the quality-fetish bonus points payoff for the buyer is huge. Achieving more or less the same results while spending more money is pretty popular among people who can afford it.
  • 2 1
 You really have to wonder. Yes Fox, RS, etc have more than one application their shock chassis needs to accommodate, but who has the bigger budget, the larger workforce, the greater amounts of data and rider input? Sure as hell not the solo mechanic.
  • 4 2
 "Coil bind is when the spring wants to rotate and twist as it is compressed."
Wouldn't a needle bearing on the spring's preload thingy fix that?
  • 2 1
 Sure would. It's used it motorsport applications.
  • 2 1
 no mention yet, even in the comments, how that rear wheel bounced out of that braking bump berm in les gets and fayolle went down. 4000 for a shock that doesnt track the ground seems kinda pointless.
  • 2 1
 I was wondering if anyone else noticed. His bike was bouncing all over the place. Compared to the riders coming down on the Sender or V10 who's rear wheel was tracking pretty well.
  • 3 0
 nerds just get out and ride.Thats what im gonna do PEACE OUT
  • 3 0
 I'd get sand in it trying to change the rebound trailside :/
  • 2 1
 So rad. This is how the tech moves forward. I'll definitely be waiting for the tech to trickle down from the $4k price point though. Smile
  • 1 1
 I feel like that's a pretty reasonable prototype price, for how bare bones it sounds, and the requirement for internal adjustment, I bet you could bring that cost down substantially even in small volume.
  • 1 1
 I had high hopes for like a proprietary semi-locked sag point for pedaling efficiency, or terrain sensors that keep the wheel in contact with the ground at all times, or continuously variable stiffness or something.
  • 2 0
 "Some say he only won at Lourdes due to the rain"...please. He had ZERO chance without the rain.
  • 1 1
 I love all this technology this shock looks very good. with 29 DH bikes been seen all the time is amazing how this 27.5 Polygon looks like a 26 inch bike...
  • 1 1
 Spherical bearing to prevent side loading is very smart, affirming one of my concerns with the move to "trunnion mount" shocks.
  • 1 2
 Put it on the non-trunion end?
  • 1 0
 I want Tod see that suntour air shock. Pretty interested after they produced that good new rux
  • 1 2
 "Inside the main chamber, there is an oil-filled bladder and air pressure around its exterior, inflated between 100 and 200 psi." Hmm... i have never seen this layout in any other shock...
  • 1 1
 I assume you're being sarcastic.
  • 1 1
 In every other rear shock is air in the bladder and oil around it.
  • 1 3
 That data acquisition system looks like a much more complex "suss my bike". Or I should say
"suss my bike" looks like a more simplistic version of the data acquisition system polygon UR is using
  • 3 2
 The price dampened my spirits.
  • 1 1
 Nice article! Funny to read some of the opinion about the spherical bear function Smile you guys never tried, have you?
  • 2 0
 FINALY a bicycle article
  • 1 0
 Dat was the best bike over the world. DH9 Polygon.
  • 1 0
 Lol I don't think that fits in my M9
  • 2 1
  • 1 0
 Psycho Killer *
  • 1 0
 Qu'est que c'est?
  • 1 1
 Such a cool piece of kit, even more awesome in person
  • 3 3
 This conversation is becoming really progressive.
  • 1 1
 nice read. i like the applications of data aquisition too
  • 1 1
  • 1 0
 Youhou !!!Thx PB ☺
  • 1 1
 It must be a dream come true to be riding a bike take well customised.
  • 1 0
 gimmie that
  • 3 5
 3k to machine - yh yh yh we've heard this all before somewhere ay Push
  • 8 1
 Turns out CNC machines don't just appear in people's shops.
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