SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/bike-helmet-replace-after-hit

Your bike helmet took a hard hit but looks fine. What does the required warning label say?

Return it for inspection or replace it, since damage may be invisible.

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  1. Keep using it if there are no cracks
  2. Return it to the maker or replace it ✔
  3. Tape it up and keep riding

Why: Helmet foam crushes to absorb one big impact, and the damage often can't be seen. US rules make every helmet warn you to send it back for inspection or destroy and replace it.

Huh, didn't know that: Cleaners like bleach or ammonia can also hurt a helmet without showing it.

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My old helmet did its job once. Now it's retired and doing stand-up as a flowerpot.
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References

Answer: Return it to the maker or replace it. Helmet foam crushes to absorb one big impact, and the damage often can't be seen. US rules make every helmet warn you to send it back for inspection or destroy and replace it.

  1. 16 CFR Part 1203 Safety Standard for Bicycle Helmets www.ecfr.gov/current/title-16/chapter-II/subchapter-B/part-1203
    a helmet that has sustained an impact should be returned to the manufacturer for inspection, or be destroyed and replaced
    Checked 2026-10-12.
  2. NHTSA: Fitting Your Bike Helmet (hosted by ND Dept. of Health) www.ndhealth.gov/injury/publications/8019_Fitting-A-Helmet.pdf
    Replace your helmet when it has been in a crash; damage is not always visible.
    Checked 2026-10-12.

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