You should typically change your bike helmet every 5 years, or immediately after any crash.
Here's a more detailed breakdown of when it's time for a new helmet:
General Replacement (Every 5 Years)
- Foam Degradation: The Expanded Polystyrene (EPS) foam that protects your head degrades over time. This is largely due to exposure to ultraviolet (UV) radiation from sunlight, which weakens the foam's ability to absorb impact. Think of it like sunscreen for your head - it breaks down over time.
- Material Aging: Even without visible damage, the helmet's materials can become brittle and less effective at absorbing impact over the years.
After a Crash
- Compromised Integrity: Even if the helmet looks fine after a crash, the internal structure could be damaged. This damage may not be visible to the naked eye. A helmet is designed to absorb impact by crushing. Once it's done that, it's compromised.
- Replace Immediately: Any crash, even a seemingly minor one, necessitates replacing the helmet immediately. Do not risk using a helmet that may not perform properly in a subsequent impact.
Other Reasons to Replace
- Visible Damage: Obvious cracks, dents, or separations in the foam or shell indicate that the helmet needs replacing.
- Poor Fit: If your helmet no longer fits snugly and comfortably, it's time for a new one. Fit can change due to age, weight changes, or simply the helmet's adjustment mechanisms wearing out.
- Manufacturer Recommendations: Always refer to the manufacturer's instructions for specific replacement guidelines. These can often be found on the helmet itself or on the manufacturer's website.
- Outdated Technology: Helmet technology improves over time. If your helmet is very old (over 5 years and has not been crashed), consider upgrading to a newer model with improved safety features.
In summary, prioritize your safety and replace your bike helmet every 5 years or after any crash, regardless of visible damage. Regularly inspect your helmet for signs of wear and tear and consult the manufacturer's guidelines for specific recommendations.
