1686Views8Replies

Author Options:

How do i make a bicycle helmet larger? Answered

It doesn't fit my head. Should i sand it with my dremel? I don't have anymore cutting wheels.

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.
0
kelseymh
kelseymh

11 years ago

I would recommend strongly against doing that. Bicycle helmets are made with pressure-formed styrofoam. They protect your skull by "absorbing" the momentum of impact. That happens by having the styrofoam get damaged (it cracks, the grains separate, and so forth) rather than your head doing so. If you "pre-damage" the styrofoam by doing what you suggest, it will be less able to absorb an impact.

0
Yerboogieman
Yerboogieman

Answer 11 years ago

So that is worse than not wearing a helmet?

0
kelseymh
kelseymh

Answer 11 years ago

It's not worse, except to the extent that you assume you are being protected, and therefore behave more dangerously than you might without a helmet at all.

0
kelseymh
kelseymh

Answer 11 years ago

P.S. This is why you really should get rid of a helmet (or at least not use it for safety purposes) if you've been in an accident. Even if the outer plastic shell looks fine, the styrofoam core may (and should!) be broken.

0
frollard
frollard

Answer 11 years ago

It's almost a shame they're designed to critically break...not just absorb and spring back like a very firm memory foam. Granted - in the types of force involved in a crash you pretty much need a very hard foam... I'd rather have the helmet break than me.

0
Re-design
Re-design

11 years ago

If you alter the helmet and then get hurt, your case in the law suit will really be damaged by that fact!

0
Kryptonite
Kryptonite

11 years ago

Well firstly it's dangerous, but that's already been covered. And secondly, because it's made out of a specially formed styrofoam then it's hard to increase the size and keep the actual purpose of the helmet; safety. I guess if you were doing it for looks you could fibre glass the outside and hollow out the inside.

0
novakfor3
novakfor3

11 years ago

Like kelseymh said, it is very dangerous. You could actually make the bicycle helmet dangerous by modifying it.