How should a helmet fit a rider?

A helmet should fit snugly on a rider's head to ensure that it provides the maximum protection in the event of an accident. A snug fit minimizes movement, reduces the likelihood of the helmet shifting or coming off during a crash, and maintains proper alignment. This fit ensures the protective elements are correctly positioned to absorb impact effectively.

While comfort is important, it should not compromise the helmet's security. A helmet that is too loose may fail to protect the rider adequately, as it can shift during riding or in the event of an impact. A snug fit provides a balance between comfort and safety, allowing riders to remain focused on the road without worrying about the helmet's stability. A helmet that fits correctly also ensures that the retention system, including the chin strap, is effective in keeping it securely in place.

The other options describe fits that do not provide optimal protection or imply limited helmet usage, neglecting the importance of wearing a helmet at all times while riding. A helmet should always fit snugly, regardless of the duration of the ride.