Had a small off over the bars yesterday on a double step down and landed somehow on the back of my head followed by my R/H side back. I think it's fair to say that my helmet, a relatively cheap Specialized Tactic, did exactly what it's meant to and saved me quite an injury judging by the split in the back!
As an aside what do you reckon to my bruise, 24hrs on?
Where's TJ when you need his "facts"?
A bit of superglue will fix that right up for you!
Has anyone on here ever claimed on Specialized' helmet replacement, are they going to want to see a receipt do you think?
Has anyone on here ever claimed on Specialized' helmet replacement, are they going to want to see a receipt do you think?
LOL at CFH
Helmets? Useless. There's no way my skull would have cracked that badly.
I'd hold off on spending on a new hat
You just wait until the results of the rotational forces kick in - you'll wake up dead one morning
Judging by the shape of the bruise on your back it looks like you landed on a small kiwi-type bird! 
Bit of gaffer tape and that will be fine.
Wasn't as soft as a kiwi, might have been a quail!
Spesh just need proof of purchase and a cheque for the value of the new helmet sending to their head office. They basically do you a cheap upgrade that's the way the crash replacement policy works. . . . .looks like you we're one lucky boy. Good effort though, 10/10 for breakage.
Guys - I know you are baiting me but...........
that helmet has failed - it provided little protection. A helmet that has worked has crushed not split
Rotational forces from helmets are real and proven experimentally as shown by the TRL amongst others.
Don't be sheep -be sceptical and look for proof. Follow the science
Simwit, off you go, you need to re-create the same crash with no lid on and come back and tell us the outcome (or not come back) 
I've never worn a helmet for high speed crashes ( where those rotational forces might start to play a part), but for this type of low speed impact. My worst crashes have been at less than 10mph and resulted in ( on different occasions) a fractured pelvis, a fractured shoulder and fractured ribs. These low speed smack-downs are where helmets really come into play.
I'm also really interested in the fact that the extra coverage at the back of the head touted by mtb helmets isn't just a fashion affection after all...
Sorry but STW has taught me that although you may believe you are OK, you will at some point wake up dead and it's your helmet that will have done it. At present it is only specialized's helmet marketing hype that is keeping you alive, where do I send the flowers?
that helmet has failed - it provided little protection. A helmet that has worked has crushed not split
Rotational forces from helmets are real and proven experimentally as shown by the TRL amongst others.
I'm quite interested in what type of polystyrene crushes rather than splits or cracks. Oh, here's some scientific facts.
1/ My first helmet, cracked when i landed hard after a bad crash
2/My second helmet also cracked after i crashed and
3/ guess what, my own science proved that my 3rd helemt also split after craching hard.
Now 2 of these were specialized and 1 was a giro. I think my own science has proved that a cracked helmet has done its job properly.
Beats men in white coats in a lab i bet as well.
Also, his 'non protected' back looks worse off than his 'failed, but protected' head i bet
TandemJeremy
that helmet has failed - it provided little protection. A helmet that has worked has crushed not split
Can you provide a reference for that you old waffler? If the helmet has absorbed and dissipated some of the energy rather than the skull, then it has worked.
Tootall - plenty but it won't be believed on here. I will be mocked for even suggesting it and the cyclehelmets.org site will be mocked
People have the is evangelical belief in helmets - and a broken helmet is taken as proof of it preventing injury. They simply are not that good. If the helemt is cracked without being crushed then it has failed and not absorbed much energy
Helmets designed to handle major crash energy generally contain a layer of crushable foam. When you crash and hit a hard surface, the foam part of a helmet crushes, controlling the crash energy and extending your head's stopping time by about six thousandths of a second (6 ms) to reduce the peak impact to the brain. Rotational forces and internal strains are likely to be reduced by the crushing.http://www.bhsi.org/general.htm
But my helmet broke - isn't that proof?
A helmet is a fragile piece of equipment. On seeing a damaged one, it is easy to assume that a serious injury has been prevented. Cycle helmets split very readily, and often at forces much lower than those that would lead to serious head injury. Helmets work by absorbing impact energy through the crushing of an expanded polystyrene liner. Once compressed the liner stays compressed. It does not bounce back to its original form like reusable helmets for some other activities. If a helmet splits before the liner has partially or fully compressed - and this is often the case - then it has simply failed. It will not have provided the designed protection and may in fact have absorbed very little energy at all.
I wrote off 2 spesh helmets (along time ago though) first one was a compression complete with a small split ride up the middle from the back where I hit my head. 2nd one was compression only on the front right from a faceplant. Had a bit of a headache both times but that was all. Sent them both back with a fiver (that was what it said in the policy at the time) and received an upgrade helmet in return
The one time I needed a helmet I wore it. Sheet ice on my road I washed out sideways and I was still holding the bars on the floor.
@ TamdemJeremy
I was present when Simwit had his tumble and I don't need to read any websites, test results or tea leaves to realise that the helmet saved him from a head injury. As you say the helmet has "failed" because it has split but the helmet has nevertheless prevented a head injury and that has to be a good thing.
The ground where the incident occurred had exposed rocks on it and one/some of those rocks impacted with Simwit's helmet. The helmet received the impact from the rocks and this helmet has the marks to prove this (although the photo's don't show this too clearly). If he had not been wearing the helmet the rocky ground would have impacted directly with his skull and caused injury.
As Simwit says - Wear your helmet kids.
piha +1
I am a bit confused here which would be the safest helmet then
the Mullet style which covers the head closely or the interlaced polystyrene things which sit on top .
ref rotational injuries they look to have more leverage to cause neck problems
Trout - http://www.bhsi.org/ideal.htm
The crucial things are fit, smooth outer shell and plenty of EPS
Rotational injuries are not just neck injuries but a type of brain injury called diffuse axon injury
Piha - read the second link I gave.
Ouch! That looks sore...
As far as helmet breaking goes, I'm no expert but I was under the impression that although compression of the helmet would result in more of the energy being dissipated surely the cracking of the helmet is going to have an effect? And just the fact it has a hard shell means its going to offer protection. Might not prevent your brain being thrown around in your skull and what not but anything that puts a barrier between head and potentially sharp, pointy rocks has got to be a good thing right?
TandemJeremy- Thanks for that but I don't have time to read all the info at the moment but will read it when I get time. What I would say is the the link looks like it get much of its information from RTA records and police reports of RTA. This does not reflect the tumble Simwit had.
Can you find a link that supports your view that is mountain biking specific?
becky -thats about right I believe
piha - unfortunately there is virtually no research about MTBs and helmets. A big gap in the evidence
The three lads I saw on sunday afternoon could do with reading this, nice shiny bikes and camelbaks etc and not one of them wearing a helmet as they headed off into the woods!! Still amazes me!!
Anyone know what giros crash replacement policy is in the uk? Doesn't seem to say on their site
Analogue Andy cheers for the offer but I'm a bit sore/stiff at the moment, do you think it can wait 'til next week
Like Piha says there were exposed rocks where I fell & the evidence of where one impacted is on the helmet so I have no doubt that it did what it's meant to and protected my head from serious injury. Wether it should have cracked or crushed is neither here nor there AFAIC
unfortunately there is virtually no research about MTBs and helmets
Astounding! An opinion based on no fact whatsoever.
flatfish - but there is loads of research about how helmets work in general and what I said above is based on the science and the evidence
TandemJeremy - MemberPiha - read the second link I gave.
which bascially says if you're going extremely fast and crash into a lamppost or car you may still die. if you're going more slowly and crash, your helmet may well mean you don't injure yourself. the world waits for the next astonishing update!
It says a lot more than that flatboy including some discussion on how helmets work. Still - as I predicted above I will be mocked for following the evidence
This topic has been closed to new replies.
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