If your helmet has ever taken a hard hit, it's done. That stays true even when the shell looks clean enough to ride home in, because the damage that actually matters usually hides in the foam.
How long has this one been on your head?
Age plays a role, mostly through UV exposure and sweat. But no U.S. regulator publishes a single retirement date for these things. You inspect the helmet, you read what the maker says, and you pull it from service after a real blow.
Replace the helmet after a crash
A helmet handles a hit by crushing its liner. That crush happens once. After the foam has compressed, it can't do the same job on the next impact, no matter how intact the outside looks.
Don't keep riding on a crashed lid to see how it feels. You won't feel the internal failure. That's the trap.
Right after an incident:
- Stop riding. The helmet stays off your head for any further trip.
- Check the outer shell for cracks, dents, or a shape that no longer matches from one side to the other.
- Look at the interior foam and pads for crushing, cracks, or foam pulling away from the shell.
- Retire it if it hit during the crash, or if the drop was harder than a light scrape. No reuse.
Consumer Reports has said the exterior can look fine while the foam inside has already compressed. That's consensus guidance, not a kitchen-table lab test. Your manufacturer's manual carries the model-specific wording, so read that part too.
Inspect the shell, foam, and straps
You don't need tools for this. Sun, sweat, and the occasional cheap drop do the slow work on their own.
Helmets.org flags fading or tiny cracks around the vents as a sign the UV inhibitors in the plastic are failing.
So here's the routine. Hold the helmet in real daylight and turn it slowly. Cracks, dents, gouges, or sticky residue on the shell are enough to stop using it. Vent holes and the brim crack first, so look there twice.
Press the interior foam with your thumb. It should spring back instead of staying packed down. Torn pads, a sour smell, or foam separating from the shell ends this helmet's run.
Straps tell on you as well. Frayed webbing, a buckle that slips, or a chin strap that won't hold tension can let the whole thing peel off in a fall.
Storage matters more than people expect. Keep it cool and dry, out of the sun. A hot car cooks the plastics faster than a season of commuting.
Plenty of helmets look fine from across the room, then you get in close and the pads are packed flat, the straps have that shiny stretched look, and at that point the printed date is basically beside the point because the wear is already doing the talking.
Decide by age and how hard you use it
Find the purchase year or the stamp inside the shell. Julbo tells riders to replace every 3 to 5 years in normal use, and immediately after a significant impact even when nothing looks broken. Consumer Reports has used a 5-year caution for well-used helmets.
Thing is, lab work on old foam doesn't match those calendars one for one. Consumer Reports has also cited research that found no significant foam degradation in uncrashed helmets stored reasonably well, including examples up to 26 years old.
No U.S. regulator sets a universal replacement age. Follow the manufacturer first, then keep inspecting so you don't toss a sound helmet for no reason.
If it crashed, replace it. If you can see damage, replace it. Daily sun-and-sweat commuting in that 3 to 5 year stretch is the gray zone: open the manual, then look harder at the vents, straps, and foam.
What the CPSC label is actually promising
Helmets sold in the United States must meet the CPSC bicycle helmet standard in 16 CFR Part 1203 before they can be manufactured or sold at all. What the label doesn't do is pick your replacement month.
The certification involves lab drops onto anvils:
| Anvil | Impact speed | Rough drop |
|---|---|---|
| Flat | 6.2 m/s | About 6.5 ft |
| Hemispherical or curbstone | 4.8 m/s | About 4 ft |
A sample takes multiple impacts during testing. Open up the liner and look inside: you want a line stating the helmet complies with CPSC 16 CFR Part 1203.
A lot of riders treat that sticker as a freshness date. It isn't one.
An undamaged, uncrashed, certified helmet can still do its job, even if a newer model on the wall carries rotational-impact hardware yours never shipped with. That's a fair reason to upgrade when you're already shopping. It isn't a recall of the one on your hook.
Pick a replacement that actually fits
Stay with a CPSC-certified helmet, and skip anything used if the label is gone or unreadable. Turns out a bad fit wastes more protection than people think, because a loose lid can rotate off or leave the temple exposed.
Before you keep a new one:
- Measure head circumference, then try sizes until it sits snug with no pressure points.
- Form a V with the straps under each ear and buckle so the clasp lies flat.
- Shake your head. The helmet shouldn't rock or slide.
- Match the shell to your head shape and your use. A commuter lid and an extended off-road helmet won't feel the same.
E-bike and scooter riders can run the same crash-and-inspect logic unless the maker writes different rules. Faster machines produce harder hits. Read that model's guidance instead of assuming every bicycle helmet covers every micromobility crash.
FAQ
What if it looks fine after a minor crash? Replace it anyway. Internal foam damage may not show.
Is there one replacement age for every brand? No. Manufacturers often say 3 to 5 years. Research on stored, uncrashed foam has shown much longer performance. Use the manual plus your own inspection.
Do e-bike or scooter helmets follow different replacement rules? Not unless your manufacturer says so. Check that specific manual.
How should I store it so it lasts? Cool, dry, out of sun and heat. Don't crush it under bags.
Can I keep an older certified helmet if it never crashed? Yes, if it's CPSC-certified, undamaged, and still fits. Later manufacturing changes don't automatically retire the one you already own.
Where do I find my brand's replacement advice? The company's website, or the paper manual that came in the box.
Pull the helmet off the hook and give it the daylight check. Any history with pavement means replace. If it's clean, write the purchase year on a strip of tape inside the shell so you aren't guessing next season. To be honest, that tape note is the step most people skip, and it's the easiest fix for a bad memory.