Any ride is its coldest before you start riding, so wrapping up as you’re performing any pre-ride faff is certainly wise but if you were to keep those layers on as you ride, you’ll overheat pretty quickly. Us mountain bikers often forget about rear lights, but small sections of road riding are common fixtures in any off-road ride. While there’s no legal limit for the power of a bike light, they mustn’t dazzle oncoming road users, and many high-power bike lights are more than capable of doing so.