Neck tubes & chin strap

[MarkJ]

The whole Simoncelli helmet thing got me thinking about where I put my neck tube in the colder months. I pull the neck tube up to my bottom lip and then fasten the chinstrap over it tightly, but this might give a little more 'give' on the strap if I crash.

Anyone else do it this way or another? Am I worrying unnecessarily?

[DrDonnyBrago]

[DrDonnyBrago]

I was a little intrigued by how much slack could be induced by the extra diameter of your face with the buff on...


So I've just done a wee calculation to estimate it.

I assumed that the buff in a mildly wrinkled state is about 0.5mm thick (mine is).

My chin where the strap goes makes a semi circle with a circumference of about 16cm = a 32cm full circle.

circumference 1 = 32 = pi x diameter

32/pi = diameter 1

diameter 1 = 10.19 cm.


Diameter 2 = 10.19cm + (2 x 0.5mm) (estimated thickness of a well fitting buff)


Diameter 2 = 10.29cm.

circumference 2 = pi x 10.29 = 32.33cm.

The extra slack in the strap from the buff is the difference in circumference 2-1 divided by two (the buff only covers half of your chin) circumference (c2-c1)/2 = 0.165cm.


So, if your buff was completely compressible (it is not) then you would have a chin strap 0.165cm looser (1.65mm) than if you were not wearing one. As it is not compressible and offers about the same resistance as a bit of your own face this is negligible and irrelevant.


In other words, the extra size of your face added by the buff is negligible, forget about it.

[MarkJ]

Having re-read my original post it does seem a little Daily Mail ohmygodI'mgoingtodiewon'tsomebodythinkofthechildren. It wasn't something I was really losing sleep over tbh, just wondered if it could make a difference.

My snood is quite thick though, I would imagine more than half a mm. Do you have one of those thin fabric ones?

[DrDonnyBrago]

[Rogerborg]

Weird, I was thinking the exact same thing this morning.

My (slight) points of concern are that I don't tighten the double-D strap correctly due to the padding, and that the fabric might be prone to stretching in an off and letting the strap loose.

Conclusion: maybe, maybe not, but I'm not going to change the way that I wear it, so quit worrying about it.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Okeydokey]

I spent a very long year working on bike helmet design, as part of the research I found a large number of incidents where the helmet had left the head. The people who did the original research suggested due to the large number of throat/wind pipe lacerations, and the number of helmets that left the head during an accident it was down to the gel coat on the helmet and how efficiently it slid across tarmac.
When it doesn't slide well you have rotational forces that effectively peel the helmet off damaging your neck bit! I did some consultancy work for Everoak, who had the best sliding helmet (Co-efficient of Mju) and their hats were used by the Met at the time.
I have recently bought a second hand helmet.... I know how bad that is but will post more details in another thread soon.
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Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruitsalad!
YB100 v. Ford Sierra (1982 I came 2nd place) Honda H100S (Currently 0 - 0) CX500 Cafe project (me 1 - wife 0.... maybe!)

[DrDonnyBrago]