The Helmet That Was Dropped
You are helping a friend prepare for a ride. Their helmet fell from the seat of the bike onto a concrete driveway - a drop of about 0.8 m. There is no visible damage to the outer shell. The helmet is five years old and has been stored in a garage that gets very hot in summer. The friend says it will be fine because 'it looks OK'. They also plan to wear a thin cotton hoodie and no gloves because it is warm.
1. Advise on the helmet: what are the risks, and should it be used?
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Risks:
- Hidden damage: the outer shell may look fine, but the energy-absorbing liner (usually EPS foam) can be compressed or cracked by a drop, even from 0.8 m. A damaged liner will not absorb impact properly in a crash.
- Age and heat: five years is at or beyond the typical replacement age for many manufacturers. Heat cycling in a hot garage degrades the foam and adhesives. The helmet's protective ability is reduced.
- No visible damage is not proof of safety - the damage is internal.
Advice: do not use it. Replace the helmet. After a significant drop, or once it is past its service life or has been stored in extreme heat, a helmet should be retired. A helmet is a single-use protective device for a given impact; its integrity cannot be assumed.
2. Evaluate the friend's clothing choice and explain what protective equipment is appropriate.
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Assessment: a thin cotton hoodie and no gloves offer almost no protection.
- Cotton: melts and shreds on abrasion, provides no impact protection, and offers little warmth when wet.
- No gloves: hands are the most likely part of the body to be injured in a fall; the instinct to put hands out means unprotected hands take the impact.
- No leg or foot protection: ankles and feet are vulnerable.
Appropriate equipment:
- Helmet - correctly fitted and in good condition.
- Gloves - abrasion-resistant, with knuckle protection.
- Jacket and trousers - abrasion-resistant textile or leather with armour at shoulders, elbows, hips, and knees.
- Boots - covering the ankle, with a non-slip sole.
- High-visibility or reflective elements for visibility.
Dress for the slide, not just the ride - the equipment is designed for the crash, not the journey.