6/22/2026 at 8:58:20 PM
So I started biking recently and was hunting for helmets.And turns out Virgina Tech does a bunch of helmet impact testing and maintains a ranking list https://www.helmet.beam.vt.edu/. The latest helmets have a releasable layer that absorbs (converts rotational energy?) more impact.
This HUD is pretty slick. In a way, it's more preventative (avoiding accidents) vs. reactive (absorbing impact in an accident) safety which sounds nice.
by wxw
6/23/2026 at 12:54:42 AM
99% of bike fatalities involve car crashes. There is no styrofoam helmet which will protect against that, and the VaTech test notably does not model that type of crash.To my knowledge, the only group that tried to test bike helmets against a car is Volvo -- and all helmets failed.
by Drunk_Engineer
6/23/2026 at 1:15:20 AM
The key service performed by a cycling helmet is not turning a death situation into a permanently maimed situation (they do that, but that's a very rare occurrence), it's turning a life changing injury situation into a situation of some fractured bones that will be almost forgotten two months later. The life and death part is overrated.I guess one reason people are so focused on that is because it's easy to quantify.
by usrusr
6/23/2026 at 1:39:02 AM
X-Rays of Rob Pike's Shoulder http://herpolhode.com/rob/xray.htmlby rnewme
6/23/2026 at 8:04:22 AM
Yeah, there are clavicle fractures that clearly don't need any surgery, but when in doubt, always slap on some titanium. Just try to get rid of the plate before the next fracture opportunity, because then you'll get an AC joint separation instead of a fracture and that stuff won't grow back. Ask me how I know, I had surgery to swap a fracture plate for an AC plate (those AC plates really, really suck)by usrusr
6/23/2026 at 8:36:08 AM
99% of bike fatalities involve car crashes.US or globally? Got any stats to link to on that?
by robin_reala
6/23/2026 at 3:31:31 AM
https://www.facs.org/about-acs/statements/statement-on-bicyc...Helmets reduce the risk of head injury by 48%, traumatic brain injury by 53%, facial injury by 23%, and fatal injury by 34%.2 Pediatric non-helmeted bikers have a 3-fold higher risk of serious head injury compared to helmeted bikers;3 one study suggests that helmet use may reduce the risk of head injury by 83%.4
Bicycle-related head injuries and deaths have decreased in states that have enacted bicycle helmet laws.5
Larger effects are found when legislation applies to all cyclists than when it applies to children only. 6
by jibal
6/23/2026 at 5:46:18 AM
"one study suggests that helmet use may reduce the risk of head injury by 83%"That one study has been thoroughly debunked...yet decades later it still gets cited.
https://www.seattlebikeblog.com/2013/06/04/feds-no-longer-ba...
by Drunk_Engineer
6/23/2026 at 11:45:03 AM
That's not what the ACS cited; this is: https://pubmed.ncbi.nlm.nih.gov/10796827/by jibal
6/23/2026 at 9:48:10 AM
Yeah some random blog from keen bikers is really debunking it all globally, including common sense.I don't get this fanatical defense of no-helmet-at-all-fucking-cost stance many here often express. I personally know a person who died in bike accident helmet-less, she went head first due to slamming front brake too hard, straight on the head on tarmac, no complex situation, it was more than enough.
I had similar situation - new xc bike bought cca 2007, for the first time buying helmet, spent whole childhood and adulthood without one. Within 3 weeks, I had to slam brakes on narrow winding forest path due to my GF stopping abruptly behind the corner. Don't have memory of that situation, remember opening eyes while laying on the ground, looking at crumpled helmet and visor, and seeing how my forehead went perfectly into a sharp stone sticking out of the ground, not much cca 5cm. More than enough to kill me, and GF told me I hit the ground with quite a bit of force.
I have friends with broken collar bones, shoulders, wrists, scars on heads, from various common bike situations, mostly in the city. Many were skeptics, all of them wear helmets now (sometimes due to hard push from their SO). Most of our friends are doctors due to my wife being one, every single one of them had to do some time in emergency in biggest Swiss hospital, and every single one of them had seen rough head injuries including death from all those folks who swore to never wear helmet, it limits their view (bullshit), their senses (huh?) and so on.
Every single sport facing death risk is maximizing their survival chances by smart behavior and better equipment, which often include helmets. But somehow these folks feel like (since this is hard emotional debate, not factual one) they are outside normal risk envelope thats valid for every single living thing on Earth.
But sure, don't wear the helmet, but lets agree you will cover full lifetime costs of any injury treatment to head/neck/shoulders, including all after care due to permanent disabilities. And don't whine when your kids die because daddy was a bit fanatic and picked up wrong hill to wage their insecurities/arrogance battle on.
/rant
by kakacik
6/23/2026 at 11:18:42 AM
Yeah, it's funny that some guy who baselessly claims that "99% of bike fatalities involve car crashes" (when people say "99%", odds are that they are pulling it out of their nether regions) then says that a study cited by the American College of Surgeons (which only says that "one study suggests") "has been thoroughly debunked", offering a citation that doesn't say that. What it does say is that the number from the study hasn't been replicated and other studies consistently show lower numbers. How much lower? It doesn't say. But one thing that is clear is that our drunken correspondent is himself highly prone to exaggeration.And he notably has nothing to say about any of the other numbers and consequences mentioned by the ACS.
P.S. The 1989 "debunked" study isn't even what ACS cited! Their citation was an overview paper that used a broad range of studies: https://pubmed.ncbi.nlm.nih.gov/10796827/
by jibal
6/23/2026 at 12:34:53 PM
Looks like 99% of the bulletholes are in the wings here...by adammarples
6/23/2026 at 7:41:22 AM
The helmet business is amazing, and proof that one is born every minute. It deserves to be shown how many logical fallacies there are. Top of the list is anecdotal evidence, everyone with a mouth can tell you about someone that had their life saved by magic styrofoam.There is a grain of truth to the anecdotal claims. But, even then, this is very much an imagined grain of truth. What makes it fun is if you work for a specialist bicycle shop or up the chain, distributing thousands of helmets. With customer interaction at the showroom level, fitting hundreds of helmets, then selling gazillions at B2B, the question has to be asked, where are the broken ones, the one sent back for money off, as a replacement discount?
Indoctrination into the polystyrene club is also very easy. Customer buys new bicycle, customer gets upsold a helmet, as an easy win. The far more practical high vis jacket costs $5 and you make no profit on that, whereas the $50+ polystyrene is just money for the taking.
The testing was originally to a SNELL standard, but the helmets were too heavy. So manufacturers switched to the lame self-test consumer testing, 'trust us bro'. This became the new benchmark, anything aiming at SNELL or other meaningful test just did not survive the market.
Hence I keep it simple. If cycling for conspicuous leisure purposes (fitness, racing, stunts) then get the helmet and make sure the straps are tight. You will need it for organised events so you might as well get used to wearing it.
If not cycling for conspicuous leisure purposes, but merely for transport, whether that be the commute or errands, then you don't need a helmet. Get the lights, mudguards and high vis instead.
I am learning the counter-logical-fallacies, so I can counter the life saved anecdote with quality nonsense that has the same logical fallacies. For example, "I know a true Scotsman that has been cycling every day for fifty years without a helmet. Once he got hit by a car and his life was saved because he was not wearing an ill-fitting helmet, he would have been strangled by the straps had he been wearing a helmet, plus the driver would have given him less room, so the accident would have been far worse."
I digress, as for the article, the helmet is excellent for conspicuous leisure cycling. Now give me your money!
by Theodores
6/23/2026 at 9:12:13 AM
Of course, wearing a helmet is a choice and many get on just fine without it. I've come off my bike enough times where my helmet prevented a nasty bump to the head to wear one, but I suspect I'd have survived just fine without it. I view my helmet as insurance against my own incompetence - slipping on a wet manhole cover for example. For context I ride thousands of km a year for transport, but have done much riding as a conspicuous leisure activity too. I just wear a helmet and I'm not really bothered by it.by hgomersall
6/22/2026 at 9:14:08 PM
> And turns out Virgina Tech does a bunch of helmet impact testing and maintains a ranking list https://www.helmet.beam.vt.edu/Thanks for sharing. Interesting to see my Giro (with MIPS) has... 3 stars. Hmmm.
by mft_
6/23/2026 at 1:33:12 AM
Fwiw they changed their ranking system a year or two ago in a way that moved a bunch of formerly 5 star helmets to 3 stars.Too many helmets hit the old five star threshold, so to differentiate it's now based on relative performance (the x% best helmets get 5 stars) instead of static thresholds.
by Rebelgecko
6/22/2026 at 9:35:17 PM
MIPS is a liner that makes the same helmet a bit better.A crappy helmet with MIPS is a slightly less crappy helmet that may still be worse than a great non-MIPS helmet.
Like upgrading a 1960 motor vehicle death trap’s 2 point seat belts to 3 point. It’ll help, but it’s still a death trap.
by Scoundreller
6/22/2026 at 9:17:58 PM
I'm pretty convinced mips is just marketing. Hair will do the same thing. That's why in rock climbing world, petzl hasn't even bothered with it when they're usually very forward thinking about their designs (first company to do side impact testing).by carabiner
6/23/2026 at 1:26:57 AM
MIPS is increasingly common in rock helmets. Black Diamond (anecdotally the most common brand I see in the US) now has it in their higher end models, and Mammut as well.by necubi
6/23/2026 at 5:10:02 PM
Petzl makes better helmets than BD. They pioneered the ultralight foam kind with the sirocco that everyone (including BD and Mammut) copied. Yet they still don't care about MIPS.by carabiner
6/23/2026 at 9:26:42 AM
Just checked my BD climbing helmet I bought few years ago (seems like Mips Capitan model based on design).Considered these things a gimmick (any technical equipment bought has list of various tech used within, I generally ignore that by default since I have no idea what each means), happy to see move for more safety in this area. Even small steps matter.
I will climb in big heat wave we have here in Europe now this evening, more sweaty = more slippery on polished rock crags, risk is always not as far as we like to think.
by kakacik
6/23/2026 at 9:01:31 AM
It does feel like a thing that has never been properly validated. It's a good market to push this in because, well, why wouldn't you spend 10% more to be a little bit safer?by hgomersall
6/22/2026 at 9:40:13 PM
> Hair will do the same thing.VA Tech (and others, IIRC) has years of empirical tests that show otherwise. What is your comment based on?
Edit: In fact, if I understand your analysis, humans won't get concussions at all.
by mmooss
6/22/2026 at 11:41:07 PM
VA's test dummy doesn't have hair.by loeg
6/23/2026 at 2:36:04 AM
That's not a basis for your claim.by mmooss
6/23/2026 at 5:52:59 AM
What? GP's claim is that hair provides a similar benefit. VA is simply not testing heads with hair on them -- their tests can't "show otherwise" (your claim).by loeg
6/23/2026 at 8:32:10 PM
> GP's claim is that hair provides a similar benefit.GP provides no evidence for that. VA Tech not addressing it (if it's true that they don't - I have no reason to believe it) is not evidence. VA Tech also doesn't address my theory that microscopic super-intelligent aliens affect helmet response.
by mmooss
6/23/2026 at 1:07:54 AM
Thank you for this comment. I paid a little extra to get a helmet with mips but didn’t even think about my (long) hair serving the same function.by kaikai
6/23/2026 at 12:22:10 AM
I’m bald on topby throwaway173738
6/22/2026 at 9:19:55 PM
Exactly. Hair and scalp. Evolution already made a MIPS system. The thing lacking it was the test dummies that Virginia Tech uses, so now they recommend we put it in helmets too.by snovv_crash
6/22/2026 at 9:42:04 PM
Not having my hair and scalp act as the MIPS system is worth the $20 extra to me.by arrowleaf
6/23/2026 at 9:03:11 AM
I think they will already act like that, MIPS or not. Stick a helmet on your head, now wiggle it. It moves really quite a bit, unless you like to wear it so tight you get a headache.by hgomersall
6/22/2026 at 11:42:07 PM
Is it worth helmets that are 100g heavier and don't breathe as well, though?by loeg
6/23/2026 at 1:07:10 AM
I think that’s a false dichotomy.My Lazer Genesis Helmet is a MIPs and it’s the lightest helmet Lazer made at the time.
Much more breathable than my previous helmets too.
by enjeyw
6/23/2026 at 9:14:39 AM
You forgot to mention it's also $200+. Some folks buy bicycles for less than that.by bboozzoo
6/22/2026 at 9:39:32 PM
Or the ground being low traction: dusty/dirt/wet. Harder to control what you land on, but will diminish MIPS’ ROI in many situations.by Scoundreller
6/22/2026 at 9:43:06 PM
If ruling out risks by a priori is a solution, why wear a helmet at all? Maybe you won't hit your head when you fall. Maybe you'll land in water or on a satin pillow (low friction).by mmooss
6/22/2026 at 10:02:51 PM
Not ruling out anything but pointing out MIPS’ benefits will be poorer than portrayed in the lab in many realistic situations.Sure, buy all the safety equipment you can afford that has any possible benefit.
What’s better: a $15 more expensive bike light or a $15 more expensive helmet with MIPS?
by Scoundreller
6/23/2026 at 12:52:15 AM
For $15, everybody should buy both. It's a non issueby neves
6/22/2026 at 10:27:53 PM
> MIPS’ benefits will be poorer than portrayed in the lab in many realistic situationsHow are they testing it in the lab? How do concussions work in realistic situations (is there one way?)? What is the distribution of realistic situations?
Maybe the benefits are better in realistic situations; maybe the lab tests are more aggressive than reality or the results are interpreted conservatively (because scientists spending years on something might have thought of a 30-second hot take), ...
by mmooss
6/23/2026 at 3:22:09 PM
Big shoutout to this study! Highly recommend donating if you get any value from these lists> The latest helmets have a releasable layer that absorbs (converts rotational energy?) more impact.
MIPS? Or is there something newer
by affyboi
6/23/2026 at 2:13:32 AM
I've posted that to HN before and it never gets traction. It's too bad; it's an excellent resource.by CobaltFire
6/22/2026 at 9:38:02 PM
Last I knew, several years ago, Virginia Tech tested for concussion prevention and the layer that 'slips' on impact was called the MIPS layer. (Please correct me if that's changed.)That is important and useful, and is best used in combination with other testing: Bicycling also has many other and more serious risks to cyclist head, including skull fractures, brain damage, and death.
Consumer Reports is another great source (better one IMHO); in their labs they do empirical testing for other outcomes of ~150 helmets, and provide a comprehensive guide to buying helmets:
https://www.consumerreports.org/health/bike-helmets/
In Consumer Reports’ tests, we strap helmets onto “head forms” that simulate the size of a human head, then drop them 14 mph onto a flat anvil to find out how well they withstand impact. An electronic sensor inside the head form monitors the force that would be transmitted to a rider’s skull in an accident.
To ensure the helmet will stay in place during an accident, we test the strength of the chinstraps, attachment points, and buckles by dropping a weight that’s 8¾ pounds and 2 feet so that it yanks on the straps to simulate the force of a crash.
Our testers also evaluate each helmet for ventilation, fit adjustments, ease of use, and other features.
by mmooss
6/22/2026 at 9:40:22 PM
oh yea skiing and mountian biking helmets have had mips for yearsby dominotw
6/23/2026 at 12:54:55 AM
T Schumacher, the fórmula 1 champion, would be alone if he was using a MIPS helmetby neves
6/23/2026 at 4:04:03 AM
Would we aliveby neves
6/23/2026 at 1:56:40 AM
i think he scrwed holes into helment to setup his go proby dominotw
6/22/2026 at 9:49:28 PM
MIPS is great but every layer is a tradeoff with venting. without MIPS the vents allow air onto your scalp. with MIPS you effectively have a plastic shower cap over your head, beneath the EVA foam insulator.I'm anti MIPS
by tonymet
6/23/2026 at 12:54:48 AM
There are multiple MIPS systems. The early ones were like you described, with a distinct feeling of too much plastic. Newer ones (e.g. Integra) are much more seamless. There are also other companies doing different types of rotational tech, like Lazer with an integral foam-based shearing design.If you have only tried first-gen MIPS, I recommend giving it another shot.
by ctidd
6/23/2026 at 7:56:41 PM
thanks that's actually helpful. I wasn't aware of the revisions. i have a 2023/2024 POC with mips. I'm guessing it's gen whatever. I'm sure a lot of people don't mind it. I ride a lot and sweat a lot so I'm more sensitive to airflow than most.by tonymet
6/23/2026 at 1:49:56 AM
I'm looking at my 2 MIPS helmets right now and your comment is complete nonsense. If anything the MIPS layer will allow for more breathability.by PpEY4fu85hkQpn
6/23/2026 at 7:55:29 PM
how does a plastic liner improve breathability? the foam layer has clearance over the scalp/ hair. The mips layer sits over the scalp and prevents airflow.by tonymet