I agree. If the inner shell has been cracked (even though visually a small crack) i decided to order a new helmet.
But i was really contemplating the policies of insurance companies.
How safe or lack of impact resistance a helmet have after a small damage, i simply have no clue of.
But it's not worth risking a cracked skull and/ or a more serious damage to the head.
Insurance says all helmets should be replaced after a blow.
Inspection might not show hairline cracks, and this may lead to a mold injection which is weak and do not save in case of another crash/ blow.
What amazes me is the cycling clothes. Not a scratch.
(years ago i smashed in apex of a corner)
I broke a few ribs and got really banged up. Same this time, not a scratch on bibs or jersey. Helmet was scratched this time, but no internal mold cracks)
The last crash and my second, i first crasched to the right and landed on tarmac and slided down a ditch.
I got up and had a long way home, so i decided to bike instead of walking.
About 500m further it was a section of bumpy ice and i fell to the left side.
So what happened.
No damage to frame and fork after carefull inspection.
No damage to saddle.
Some scrape at pedal.
No smash against RD (thank God!)
Real abrasion at the shifters sides and at the lids of the shifters.
These could be sanded lightly and spray painted.
Bike works 100%
Also kind of lucky i had my aluminium handlebar and stem and not the latest purchase for this bike (MCFK combo).
I must say, after this i wrote Schwalbe and asked them to contemplate making Ice Spiker Pro (none wired version) in a less wide version
27.5*2.00, to fit all or most gravel bikes with 650B/ 27.5´wheelsets.
A tubeless tire would be best imo (those that prefer, could use an inner tube).
For now, neither Ice spiker pro 27.5*2.25 or Suomi WXC'R 312 27.5*2.25 fits my UP bike.
Both tires scrape chainstays.
I did find Best grip studs, but as good as they seem, the require 6.2mm penetration into a tire and stick out 2.2mm.http://www.gripstuds.com/1000_Tire_Stud.php
So a soft knobbed mtb tire at 27.5*2.00-2.10 would work.
Studs are really high end, but they cost alot of money.
300 studs is about 200-230 Euro incl a tool to fit them with.
Last but not least, don't bike without your cell phone in case you fall really bad!
Take care guys!