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Video: Do You Really Need To Replace Your Helmet After Every Crash? Ben Cathro Investigates

Jul 9, 2024
by Pinkbike Originals  

Do you really need to replace your helmet after every crash? What does Mips actually do? Why do shell helmets get higher safety ratings than full-face? Ben Cathro answers the most commonly asked helmet questions.

This video was made with support from Met Helmets.


Author Info:
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Member since Feb 15, 2012
1,152 articles

  • 115 1
 I buy and wear helmets to protect my head. Ideally I would love to buy a helmet that would offer me the best protection for the speeds I am normally riding at on my bike.

It is incredibly frustrating that there is no transparency for most of the data. The answer to why they don't publish the raw data was not really an answer. Sure, an independent lab does the certification, but if the standard is less than 300Gs and one helmet is at 299Gs and another is at 50Gs they get the exact same rating. Without building a helmet test lab in my garage, how can I as a consumer try to buy a helmet that will put the least amount of energy into my head?

Release the data! Let consumer's make informed decisions!!
  • 35 1
 THIS! The same can be said for a lot of different things in the cycling world. Tyre companies should give us the actual hardness of different compounds, brake companies should tell us exactly how much mechanical and hydraulic leverage is produced (at different reach measurements too), knee pad companies should tell you exactly how much they absorb impacts, handlebar and rim companies should give us some actual raw data in relation to compliance, etc etc. And if the companies won't do it, the reviewers and journalists should be doing these tests themselves. So far enduro magazine and bikerumor are the only two that I have seen actually do anything along these lines. It's a shame that pinkbike never really do this because it would be incredibly useful for consumers, especially alongside the seemingly pretty good reviews that they are doing these days
  • 118 0
 The Virginia Tech rankings are worth a look - they give the helmets a score based on the performance in their lab. As for raw data, I know Leatt publishes their CE testing certificate, which shows the results of the various tests.

And @samdaman1 , we're working on getting a lab up and running that'll hopefully be able to tackle some of those questions.
  • 10 0
 @mikekazimer: This is great news! Can't wait to see what you can do with that and really looking forward to some of the outcomes, and if you can elaborate at this point, what sort of stuff are you planning on testing?
  • 20 0
 @samdaman1, it's still early days, but several of the things you mentioned - knee pads, handlebars, will likely be the starting point.
  • 3 0
 @mikekazimer: brilliant idea. Looking forward to that.
  • 2 1
 @mikekazimer: that's good on leatt, now if they can get their full face helmets to not look like the chin bar is 2 inches too short!
  • 3 1
 @mikekazimer: VT is a very reliable source. Industry standard. Bell/Giro/Fox are all now operating out of a very solid test lab and release good information on their products. They independently test but for obvious reasons can't release the data from those tests.

Curious what a PB test lab would look like. I've seen those test labs. The equipment is very expensive as is the staff to design, build, maintain and operate the equipment. You also need a very large press to properly dispose of tested product.

Seems like borrowing a test lab to run annual tests would be a more realistic way to go.
But it would be rad to see another completely stand alone test facility out there collecting honest unbiased data. Good luck!
  • 8 0
 @onemanarmy: Do you mean that the only proper way to dispose of destructively tested gear is to squish it flat using a large hydraulic press? Because I don't believe that's true; why not just cut things in half? That's what we do where I work, to non-obviously but still dangerously broken bike parts.
  • 7 1
 Personally I’d prefer the 3rd party test results to be published. Producers claim all sorts of stuff… most of which is marketing gibberish.
  • 4 8
flag Simzesun (Jul 9, 2024 at 12:03) (Below Threshold)
 The thing to realize is for a helmet to really prevent concussion, it should be really big and thick.
Concussion are directly linked to deceleration, and deceleration at a given speed depends on distance of deceleration.
With a helmet a couple centimetres thick (or an inch in freedom units), it is impossible to prevent concussion at 30 km/h (19mph).
  • 1 0
 @barp: That works too. Just needs to be unusable because people love to dumpster dive and it's a great way to get sued. Recycled, destroyed, etc. How you do that is up to you.
  • 2 0
 @Simzesun: I'm sure it also depends on how much of that force is dissipated around the whole helmet rather than just the point of contact.
  • 3 0
 This is where testing like VT comes into play
  • 4 0
 @Simzesun: This is true. And there’s a lot of discourse about the ability of helmets to prevent concussions and even CTE. But one thing I often see omitted from the discussion is that helmets prevent your head from splitting open like one of Gallagher’s watermelons. That’s worth it for me.
  • 5 0
 @samdaman1: Freeride Magazin does that. When they test helmets, kneepads or tires the collaborat with TÜV Süd in Germany do give you those results.
  • 3 1
 @ TimBikesAlot The simplest way I can explain the "why" is that a single data point from a rigorously controlled lab test isn't perfectly comparable to a real world result for every individual, in every instance, because of the huge number of variables that define a real crash/impact. Every impact is a unique event, defined by variables including speed, rider mass, surface, angle of impact, environmental conditions, condition of the helmet, rider anatomical variances, and so on. There is simply no way to guarantee that "A" (the result in the lab, one time or maybe a batch that is averaged...?) will be equal to "B" (the result in the real world, every single time) because of real world variables. So having you make a buying decision based solely on the "A" data point could be seen as misleading when "B" is a different reality. Hope that helps, even if it's not satisfying...
  • 2 0
 The German Bike magazine regularly includes lab tests in their parts and equipment tests and publishes the data, including for helmets:

Also for bars (testing to failure), forks (lab-measured spring characteristics, at least), tires (rolling resistance, puncture resistance), etc.

I like it and use it whenever I buy something, but the somewhat nerdy "German engineering approach" is often made fun of in this forum...
  • 4 2
 @dmclemens: I agree if course!
I don't know why I'm being down voted. I am simply stating facts, a helmet will never be able to prevent concussions, it's physically impossible.
It can reduce concussion from rotational energy, it can be made possible to reduce the force as much a possible, but in the end it would be too big to prevent concussions in all cases.
  • 2 0
 Several magazines do lap testing helmets already and they publish the data and forces the helmets absorbed. When buying a new helmet I definitely have a look at those tests, same goes for all protective gear like backprotection, knee etc. I personally wouldn’t rely on the data of the helmet manufacturers even if published.
  • 2 1
 @Simzesun: you're being downvoted because everything about your last statement was wrong.
  • 1 0
 @onemanarmy: enlighten me please
  • 1 0
 Ill read every report you´ve mentioned. And then go ahead and buy the newest Carbon D4 available.
  • 5 0

First part of the statement: The thing to realize is for a helmet to really prevent concussion, it should be really big and thick.

False. Depth and size don't have anything to do with impact protection or rotational protection. In fact, in some cases they can be worse. That is why you don't ride trails with a dirt bike helmet and why we have certifications for different types of impact. You have something that's super big and thick and you can actually increase the odds of getting a rotational concussion.

Statement numbers 2: Concussion are directly linked to deceleration, and deceleration at a given speed depends on distance of deceleration.

Partially true. Read this: www.ncbi.nlm.nih.gov/pmc/articles/PMC3979340

What you're saying is a super simplified answer. So technically not wrong... but there's much more too it.

Statement 3: With a helmet a couple centimetres thick (or an inch in freedom units), it is impossible to prevent concussion at 30 km/h (19mph).

False. I could write a book on why but I'm not going to. It's just wrong.

If it's a direct impact it can most definitely prevent concussion. If it's a glancing blow much less can prevent it. If it's an instant stop or head slap situation then it can prevent it. In all cases it CAN prevent it. Not saying it will. Just saying it's possible.

Again... everything you said was wrong. That's why you were being downvoted.
  • 1 0
 @pugafi: nice lid.
  • 1 0
 @mikekazimer: D3O and Sas-tec who makes most of the inserts in our protection pads have their measured impact force at their homepage. Sas-tec has less then D3O but some :/
  • 1 0
 @mikekazimer: has anyone done any testing to find out if smith koroyd is actually more protective than regular full eps foam? I have been looking for info on this and can't find anything outside of koroyd talking about their own product.
  • 1 0
 @kirchenschlager: I'm not Kaz, but I think you can kind of infer that it isn't more protective than standard foam from the Virginia Tech tests and grading. There are Koroyd helmets that are very highly rated, but all of the best rated helmets are eps.
  • 63 0
 If I replaced my helmet after every crash, I'd be going through 2-3 per ride!
  • 3 0
  • 24 0
 Is your username an attempt to spell "squirrel"?
  • 4 0
 Here's a true story of twisted logic.
I met a guy on the trail once. No helmet - i asked him why. He said he couldn't see the point of them because he keeps crashing and when he does, they always break.

He might still be alive, he might not. Who knows?!
  • 1 0
 Well it is not about crash but about the times you hit your head obviously.
  • 1 0
 Regarding this, which Helmet brand actually has a replacement / loyalty program? Do any of them? or do they all just want us to shop around each & every time?
  • 1 0
 @Smoorbs: specialized has a crash replacement policy, they offer a discount.
  • 1 0
 @Smoorbs: TLD has a crash replacement and loyalty program ... if you live in the USA :-( since D4 fullface are available in Oz, why can't i get loyalty points for it ?
  • 30 0
 Great thing to film and narrate. Excellent.

I do DH …so I wear a DH rated helmet.
I do enduro ….so I wear an enduro helmet with chinbar.


I wear an enduro helmet with chinbar when I do a long distance XC ride.
And I wear an enduro helmet with chinbar when I commute to work 18km there and 18km back.
I do get comments.
Why do I wear it? Not because it’s my only helmet. We have a STACK of helmets.

It’s because four winters ago my commuting bike tried to kill me…greasy road covered in nasty slime after cold snap - no ice - but hospital full of cyclists with facial and wrist injuries. 10 arrived in the hour after I got there. The only reason I saved most of my teeth was because I pushed them immediately back in. High quality MIPS open face helmet, but 6,000 gbp of dental surgery needed, big chunk of my inner mouth bitten out. One tooth lost. Bars and stem trashed my face as I went down. Brake blades ripped chunks out of my fingers. Dental surgeon said ‘don’t do that again since I probably won’t be able to put implants in twice’.

So…full face it is for me and I just suck up the comments….
  • 6 1
 Oof, my orthopaedic surgeon told me today not to fall on an outstretched hand again because my wrist would be fine, but my radius and ulna would snap. I wear a wrist protector and I do get a couple comments.

Have you considered a gum shield like for boxing? People wouldn't comment unless you were smiling at them.
  • 4 0
 @90sMTBEnjoyer: good point ... good thought....might indeed try that....

....ouch re wrist but sounds like it grew back stronger - bony callus? - or do you have titanium and stainless in it?
  • 8 0
 @90sMTBEnjoyer + @vercorin1 - Highly recommend a mouthguard: new tech is so good you forget you have one in. I had an MTB crash wearing a fullface that still cost me 3 teeth, so I now use a mouthguard every ride, with or without chinbar. Minimalist model that is my current fav (Sisu Aero) has won out over a custom guard made by my dentist as well as several major-brand aftermarket designs, including an overbuilt "shock adsorbing" model by Shockdoctor. The Sisu guard can be custom molded at home in just a few minutes with hot water & is low profile enough that it barely interferes with talking, drinking etc. I get it in white & sometimes riding partners don't notice I have it in 'till I pull it out post-ride. Have also been unfortunate enough to test it thoroughly in several high-impact crashes that closely resemble the impact that cost me teeth before (jaw slamming shut & overlapping front teeth knocking each other loose). These impacts have left small "love bite" marks in the medium density plastic, but my teeth and jaw weren't even sore, much less damaged afterwards. Oh, and did I mention they are cheap?
  • 3 0
 @powturn: thanks for that, order placed. Been wondering about it for a while due to being old(ish) and trying to learn how to air out of quarters on a BMX, teeth / facial injuries are my squeamish thing.
  • 2 0
 @90sMTBEnjoyer: you have time to adjust mid-crash? My reactions are instinct…they happen fast
  • 2 0
 @Jready: I just go floppy and ragdoll these days
  • 22 1
 Ben Cathro supports tax evasion.... I support Ben Cathro... I support tax evasion? I support tax evasion.
  • 21 4
 Easy, did the foam crack? Replace it. There is no way the cracked foam would be able to disperse the energy it needs to in the case of another crash. No cracks and no denting of the outer shell? Only scratches? You're probably good.
  • 13 0
 That's kind of how I do it as well. I check for cracks and compression in the foam.
  • 6 0
 Internal cracks are not easy to see but also greatly reduce a helmets ability to absorb energy.
  • 11 0
 @onemanarmy: sometimes the foam is compressed behind the plastic shell and you can't see it.
  • 1 0
 @yanil38: This point exactly! The whole reason a helmet saves you in a hard impact is because the foam compresses and absorbs said impact. Sometimes the compression damage is visually obvious and sometimes it isn't... if that foam is compressed then the helmet is compromised. If I take a solid hit, not just a fall where I roll and graze/scrape my head, I replace my helmet(I have a new full face in the mail currently). That said, my last helmet served me for 4+ years with plenty of scratches and smaller hits along the way.
  • 14 0
 They could always position tomato sauce sachets between the outer shell and the inner hard foam shell.... Why has no one done this already?

Bbq, mayo and other flavoured sachets are also available.
  • 12 0
 Imagine coming up to a cyclist that had 5 packs blow on his head and not know ahead of time it's sauce
  • 5 0
 i think fox had that with fluid inside but they went to mips
  • 4 0
 @Saucycheese: yeah I know.... It'd be clear for all to see that the lid is a write off.

Cheese sauce is a good option also.
  • 3 0
 @scottlakesmtb: my dumb self would be in a pile on the ground mumbling “mmm nachos!”
  • 11 0
 most importantly this would help untrained dogs locate mountain bike crash victims
  • 3 0
 @tom-mc: If you're going a bit slow, then your friends could shout "Come on Ketchup"...
  • 1 1
 @mjlee2003: was such a bummer! Fox had Fluid and it tested higher than mips in all ways. Mips ended up buying out fox’s tech and binning it and continuing to only use Mips in their helmets. Hate seeing crap like that and is a bummer.
  • 1 0
 Wavecel? Flave-cel.
  • 13 0
 Helmets are like underwear - They can sustain a few sharts, but a full on pant shitting and they really need to be thrown out and replaced.
  • 4 0
 That's a crap post...
  • 8 0
 I'd like to see testing & data regarding helmet crash performance for helmets that haven't seen a crash but are 1, 3, 5 and 10 years old...to see empirically how age affects performance.
  • 2 1
 It depends how many hours it has been used, rather than just the age according to helmets.org

  • 8 0
 @brennanson Here's a quote from DeMarco et al. 2017. Annals of Biomedical Engineering, Vol. 45, No. 8, August 2017 (2017) pp. 1974–1984 DOI: 10.1007/s10439-017-1842-4
"Overall, age was related to either no difference or a statistically significant but small increase (0.76 g/year of helmet age) in peak headform acceleration. Extrapolated across 20 years, age-related differences were less than both style- (traditional vs. BMX) and size-related differences. The age-related differences were also less than the variability observed between different helmets after accounting for style, size and certification effects. These findings mean that bicycle helmets (up to 26-year-old traditional helmets and 13-year-old BMX helmets) do not lose their ability to attenuate impacts with age; however, other helmet features that may change with age were not evaluated in this study." I'd want to see if anyone has repeated a similar study more recently and see if their findings are similar. But it's a start.
  • 2 0
 @Snfoilhat: I'd like to add, the main aging cause for any kind of plastics is UV light and temperature changes, as they contribute to escaping of plasticizers. if you keep your helmets in a temperature stable and dark environment (e.g. a wardrobe in your hallway or your basement), the aging process should be slow enough not to make a difference. modern plastics are even more stable than the ones from some decades ago.

i have been running the same full face helmet for half my life (about five days a year), but i replaced my daily commuting helmet every three to five years as i was running it in all kinds of weather, every day. so helmet age is a concern, but can't be broken down to a single number.
  • 5 0
 This is interesting! Although we recommend not using a helmet for more than 3 years, we often test helmets that we have stored for even longer periods. We can tell you that 8-10 year old helmets generally perform like new BUT, in our specific case, storage is the key. Infact, a helmet kept in ideal conditions in a warehouse ages differently than one exposed to heat, direct sunlight, varying temperatures, weather elements, sweat, mold, impacts, and washing. Can you imagine how unique the life of an helmet is (small crashes, sun exposure, branches, rain…), impossible to recreate it in our laboratory!
  • 1 0
 Ditto. The lab guy made a mention of testing helmets after 5 years, but Ben didn't seem to follow up on that issue. I think it's really important, because sometimes you're buying old stock, especially if you're going after a helmet that fits really well and has been discontinued. Rule of thumb for ski helmets has been 3 years. Also, does it matter whether a helmet has been in full use out in rain and sun or just sitting in a nice cool dry place and not being used would be good to know. Does the modern foam break down with use and/or over time?
  • 6 0
 I felt like they intentionally evaded directly answering the "is a motocorss helmet better?" question. While the intent of the question was on safety, the answer was
- heavier than dh helmet
- potential impact on neck
- need to keep in mind ventilation and lightness

But lets not shit ourselves. Many of the DH and Rampage riders are wearing the Moto version of their sponsored helmet... i.e. SE5 instead of D4, Moto 9/10 instead of Full 9/10 etc
I think I saw Dakota was wearing a M10... a moto helmet.

So which is it?
Is it safer? Even at lower speeds? Does the added weight actually make the impact worse for DH use?
  • 5 0
 Seeing these charts that show how much force these helmets can take is interesting and all but, personally, I've had a bigger problem with concussions on crashes that aren't that bad. Ones where you just ended up skipping your head along the ground at 5 or 10 mph. The helmet looks more or less fine(no cracking) but the way I see it, by not cracking or deforming much, it transfers more energy to my skull.

What's being done to mitigate damage from these lower intensity impacts? At this point, I don't feel like I need a helmet that can handle a bigger badder crash, I want one that can shrug off of the more numerous little ones.
  • 6 1
 ....you have raised an important point which relates to some misleading/unclear discussion in the (otherwise excellent) video.

Cathro asked 'my not use an MX helmet?'

The reply was very incomplete.

The answer is actually that MX helmets are designed for much higher speeds and accident energies than recreational mountain biking accidents - which mean that they do not deform as much as mtb helmets AT LOWER ENERGY LEVELS - so they offer proportionally less protection than an MTB helmet at recreational levels.
  • 4 0
 We know that concussions can occur even at much lower impacts. Recent medical studies indicate that the rotational component has a significant influence on the occurrence of concussions, which is why there is a great focus on rotational energy management systems in helmets. Our effort in testing helmets according to non-mandatory protocols, which are stricter than current certifications, staying way below the treshold, aims to produce more effective products, even at low speeds.
  • 1 0
 @methelmets: So what technology outside of MIPs are you using to help with this? Do you see a use for dual density EPS foam?
  • 8 0
 [Yoann Barelli has entered the chat]
  • 6 0
 Do I "NEED" a new helmet after every crash... Probably not. But when it comes to the protection of my brain I'm going to get a new one anyway.
  • 2 0
 Absolutely, even a 500CHF helmet is cheap compared to a brain injury
  • 3 0
 100% man. The other week a freaking branch got in a vent and tore out a chunk of foam. No impact, but now there was a quarter inch square of eps missing. I bought a new one. I am not taking the risk that I hit my head on that exact location, which literally happened on Sunday with my new helmet on. Hundreds of dollars is nothing when it means I can get home to my kids.
  • 3 0
 I have a question for MIPS: how much (if any) does the newer Spherical MIPS system reduce rotational forces compared to the classic MIPS liner? I realize helmet comes into play, but maybe compare Fox ProFrame (classic) vs. ProFrame RS (spherical).
  • 3 1
 Go to the Virginia Tech ratings and compare the results of different helmets with the different Mips systems you mention. Virginia Tech protocol puts a lot of weight on the rotation impact performance
  • 3 0
 @Arierep: I would except they're not on the VT website.
There are a couple half shells on there using "spherical" style rotation protection (6D ATB-2T, Giro Manifest) but they don't have conventional versions to compare against. And while the Manifest scores worse than conventional half shells like TLD A3, it feels considerably less reassuring on my head due to reduced coverage and thinner foam.
  • 1 0
 I think German BIKE magazine included something along these lines in one of their (lab-supported) tests. Or at least MIPS vs. no MIPS.
  • 3 0
 I would like to know if they design helmets differently for pros or amateurs. All helmets will reduce impact forces transmitted to the head, but one that is meant to protect from impacts at 50km/h might not reduce the impact of 30km/h crash by as much as one that is designed for impacts at that speed. In my mind that makes sense, since the breakpoints (cracking) would happen earlier in the impact for one designed for lower speeds. Which would be a good thing for a lower speed impact, but a bad thing for higher speed impact if it cracks too early and has nothing left to resist the later g-forces of the impact.
Or maybe a better question would be how they choose the impact speed of their tests.
  • 3 0
 A lot of brands are using a dual density foam or different foam layers with this in mind in their higher end trail and enduro helmets, as its the best of both. A lot combined with a mips layer too. One layer of foam is designed to aid in slower impacts, while the outer is designed to aid in higher speed impacts.
  • 14 0
 From my experience (at a helmet company for some time), no and it would not be logical to do so unless we're talking about prototypes or development samples. Why? Pros don't always ride faster. And very crash is a unique event with a huge range of variables (speed, temperature, surface, rider mass, angle of impact, location of impact on the helmet, rider's anatomical "situation", etc). Helmets are designed to standards based on years or even decades of data, basic physics and the limits of what riders can/will wear every time they ride. While there is always room for change and improvement, the general consensus (one I agree with) is that helmets do a pretty damned good job given the range of variables they have to manage. As an old saying goes: tell us exactly how and where you're going to crash, and we can make a better helmet... for that crash.
  • 4 0
 @zigzigler: interesting insight, and one that I can’t upvote enough.

How many Pinkbikers asking for transparency in the data would have any real context for determining from that data whether helmet A and helmet B (of the same general type) would be more likely to protect their particular head in the particular circumstances of some future crash. There are so many variables in play.
  • 4 0
 Thank you for your question; it's a really interesting topic. Each of our helmet models is designed and engineered for a specific use, this means we have models which are more racing oriented than others. However, during development, the challenge is to create a helmet that performs well across a wide range of scenarios. Even among professionals, crashes can happen at lower speeds as well. Recent medical studies indicate that the rotational component has a significant influence on the occurrence of concussions, which is why there is a great focus on rotational energy management systems in helmets. Our effort in testing helmets according to non-mandatory protocols, which are stricter than current certifications, aims to produce more effective products, even at low speeds.
Additionally, regulations require professionals to compete with certified models available for purchase. Therefore, we don't have specific models just for them, what you find the shop is World Cup ready!
  • 1 0
 @methelmets: How do different levels of the same design helmet differ? I have a regular (fibreglass?) Legit, but how does it compare in ratings to the Carbon version?
  • 4 1
 The question that should be asked: Do strong pulls to lift the front wheel, rock gardens and hucks cause CTE because they are done 100000x, and without recovery? These are quite novel moves that shake the head quite a lot, and they do not happen in other sports. Even slow motion of gymnasts doesn't have these head bobs.
  • 4 0
 I am curious about this as well. Are the "shaking" motions of blasting through rock gardens and other high frequency small hits repeatedly enough to cause problems even without crashing?
  • 3 1
 My question about MIPS (or similar tech) is the following: if MIPS really provide a better protection, why would a brand morally accept not using such technology on all their products? Why selling non MIPS helmets in the first place. Surely a company that hs decent values wouldn't allow an helmet that protect less your brain to enter the market.

And don't talk me about money. There are 65$ mips helmets on the market. Cost IS NOT a factor for the manufacturer.
  • 2 0
well according to kask:-

"Most helmets tests use rotational impact prevention technologies with headforms that have a higher coefficient of friction than those of the human skull and therefore may not reflect what occurs in some accidents.

The "pass-fail" criterion is based on the BrIC value, an algorithm that defines the level of brain injury.This value must be lower than 0,68.

The final test protocol is:


oblique tests @ 45°, impact speed 6 m/s, BrIC 0,68

+ grade 80 closed-coat aluminum oxide abrasive paper

+ headform nominal coefficient of friction 0,3

+ wireless system: triaxial accelerometer + n. 3 ARS

Headform: EN960 serie


Peak of rotational acceleration, Peak of linear acceleration, HIC, BRIC ( 0,68 )

All KASK helmets successfully pass this test, with values that are substantially less than 0,68 BrIC 0,390"

"To specify the BrIC value, the maximum speed of the head for every direction is divided by the associated critical value and then added. When the BrIC value approaches the value 1, the injury risk increases." -- from google

They don't use mips, they reckon it isn't needed.
Not being a brain scientist I'm unsure who is correct but I like my brain so err on the side of caution.
  • 1 0
 @p0rtal00: yes hence why I put an "IF" in my statement.

I read somewhere a while ago that testing had shown that if we want the highest protection against concussion, the most important thing is the helmet shape. The rounder and the easier the helmet can slide against the ground or an object the better you are protected from concussion. Basically something that look like a skateboard helmet, a Poc Calyx or Crane with as little vents as possible like those helmets sold as pure commuters helmets and obviously without visor. And if you want a visor you need one that ejects at the tiniest impact.

However if you look at Virginia Tech ranking, it doesn't seem to match as there are helmets of very variying shape in all kind of rating.

All in all, it seems very hard to know any truth.
  • 2 0
 The way i see it is that mips is just a scalp for crash test dummies. Humans have a scalp crash dummies don't. You can't test helmets on human heads so mips provides a theoretical advantage in the test. Even the mips guy in the video didn't have a good answer when Cathro asked him. Am I wrong?
  • 7 3
 every 3 to 4 years, regardless of crashes, the lining gets nasty in them even after washings.
  • 9 0
 You can buy new foam linings
  • 4 0
 Always been curious about how helmet attachments (GoPros, lights, etc) could impact crashes or forces if you landed on them.
  • 3 0
 Light mounts snap off in my experience! Helmet still did its job.
  • 8 0
 Don't use screws, there's rumours that Michael Schumacher had a screwed in gopro mounted to his helmet at the time of his crash. Adhesive pads only so they come off
  • 2 0
 On the bell full 9/ full 10, the mount is built in on the top, and is designed to snap out if impacted. Works very well.

Problem is, you look like a Teletubbie with it up there on top, and it’s not the best angle, so I’ve got mine under the visor instead on my full 9, mounted using 3M pads. The entire visor is designed to breakaway, so it (should) take the gopro with it when it snaps clear.
  • 4 0
 The reason we advise against using devices attached to the helmet is that they clearly influence the impact dynamics and the helmet's performance. As you can understand, it's practically impossible to test all the devices available on the market (camera, light, etc.) in various positions on the helmets. But would be definitely cool to show some tests about it… Stay tuned
  • 3 0
 That was excellent!!! more stuff like this PB, great facility MET, Very impressive. Will definitely consider one of you helmets for my next purchase.
  • 5 0
 Please do a story on neck braces.
  • 1 0
 Great video!! Please do more of these informative videos that have no bias, just knowledge and data that PB’ers can use to make decisions.

Great job Ben.

?? Can you get Sleeper Co to do an edit on the helmet drops??
  • 1 0
 Awesome video!
One question I would be interested in (as I’m currently riding a vanguard core) is, what’s about mips noises, and how to get rid of them (silicon spray, simple washing, ??)
Would love to hear METs/Bluegrass take on that.
  • 1 0
 Hey, I know the article is from a few days back but I hope my question would reach to sbdy.
Having nasty concussion last year (and a lot of hard hits in my 40y life) I, obviously, learned a lot on the topic.
The testing, as far as is visible in the video, and by the way - thanks for such an insightful material, is about measuring the G forces on the anvil, the ball of the head. It's obvious because it's the 'thinking compartment'. But in a little that we know about concussions, we know that they are not related to the G-forces, and that was stated in the video. What elese we know is that a big part of concussion is related to neck injuries, not only because of the whiplash movement but all the spectrum of muscular tensions which can i.e. affect your vision (blurry vision is in most cases because of the muscle tension around eyes and on the face, which regulate the eyeball pressure, not because of nerve damage).
So shouldn't be the testing area of measurement extended to the 'neck' of the metal anvil, to see what forces occur on the 'connector' of our head? How the shape of the helmet and the leverage of the chinbar in ff helmets affect this area?
  • 3 0
 Really depends on the crash, if you hit your head hard, then yes. But if it was more of a bump then no.
  • 4 0
 Also: if you can't remember whether or not you hit your hard, definitely replace!
  • 1 0
 Ride your bike. Probably wear something on your melon. My suggestion is if you have to think about replacing a helmet after a crash, then that's a valid reason to replace as any.
  • 3 0
 This was such a well done video. Cathro and Pinkbike gave been an amazing combination.
  • 3 0
 Make them out of rubber like old car bumpers!
  • 4 0
 Yes, but I'm going to take your idea further... chrome! With a chrome helmet you'd only have one helmet for the rest of your life - which admittedly will only last until your next crash. But goddamn you'll look great until that happens.
  • 2 0
 If both fit, I'd choose the smaller one... Someone should tell her that
  • 2 0
 Very helpful video; thanks.
  • 1 0
 @mikekazimer: Can you get Ben to talk to KASK who reckon that you don't need MIPS and don't use it?
  • 11 9
 why video though?
  • 2 0
 I get the reasons because they're creating content that can be shared on other platforms, but I agree, a video wasn't necessary for this article.
  • 1 1
 shell helmets having higher safety rating is pure bs. pushing the fashion industry cog.
  • 1 1
 Sweet! We like that sheeiittt
  • 1 0
 Don’t disgrace party boy like that, thx
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