
Originally Posted by
Huggy
It will be fine provided your visor has an Aus standards sticker on it...
Jokes aside, cracks, splits and dents in helmets really can be a serious issue. They may look fine for many years of use, but then when it comes to the 'crunch', they may just shatter as a result of there being hairline cracks through the shell which upon impact can accelerate the shattering of a helmet.
My gf's helmet was found with a few scratches after she left it on the handlebars of her pitbike, and when we questioned her mum about what had happened to it she said "the wind must have blown it off"... in the garage, srsly? Our thinking is that she knocked it off by accident and didn't want to admit it, can't be sure of that, nor can we be sure that when it fell off it didn't wreck it.
Definitely a worry, I'm very dubious about letting her wear it for on road use... might be time for her to get a shiny new pretty one.
My thinking is that a drop from a height would be more to worry about then a chip from a rock though. It's up to you to decide that. How hard did it really hit? Think about the kinetic energy being transferred... drop a helmet from a height and it has its whole weight times the velocity it has achieved by the time it hits the ground, and pretty much all that energy is transferred into the helmet. Whereas the rock is presumably much lighter, and although it would have been travelling faster would be carrying less energy (i'd assume), plus this energy would not all be transferred to the helmet as much of it was still with the rock as it flew off after deflection. Long story short, i'd say a drop from handlebar or seat height would be worse than a rock... but hey, i really dunno, just guessing.
Just go with your gut feeling dude.
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