What is the primary risk when riding without a helmet?

The primary risk when riding without a helmet is the increased risk of head injuries. Helmets are specifically designed to absorb impact energy and protect the skull and brain in the event of an accident. Studies have shown that riders who do not wear helmets are significantly more likely to sustain serious head trauma if they are involved in a crash. This risk is compounded by the fact that head injuries can lead to long-term cognitive impairment, physical disabilities, and even fatalities.

Other options, while they may pertain to riding safety in a broader sense, do not capture the critical nature of the injury risk associated with helmet use. Issues like decreased visibility or losing balance can affect riding safety, but they do not reflect the immediate life-threatening consequences of not wearing a helmet. The possibility of receiving a ticket, while a valid concern for riding regulation, pales in comparison to the potential for severe head injuries that can have profound and lasting impacts on a rider's health and wellbeing.