Bell 4Forty MIPS Bicycle Helmet

MIPS Evolve is a safety system designed to reduce rotational forces on the brain during certain angled impacts. It allows the helmet to slide slightly relative to your head, which helps dissipate energy that would otherwise be transferred to your skull in a crash.

The Float Fit system uses an adjustable dial at the back of the helmet to tighten or loosen the internal cradle. This allows you to fine-tune the fit around your head circumference for a secure, stable feel without creating uncomfortable pressure points.

Yes, the helmet is designed with generous ventilation channels that promote airflow across your head. This helps keep you cool during intense climbs or rides in warmer weather.

While the extended rear coverage provides more protection for the back of your head than a standard road helmet, it is engineered to maintain a relatively lightweight profile at 380 grams. It offers extra peace of mind on technical trails without feeling overly heavy or cumbersome.

The visor is adjustable, allowing you to move it up or down to suit your preference or trail conditions. While it is easy to move, it is generally recommended to set your desired position before you start your ride.

This specific model is designed for a head circumference of 58-62 centimeters. To ensure a safe fit, measure the widest part of your head just above your eyebrows before purchasing.