The purpose of a cycling helmet is to protect your head if you crash, but aero-savvy riders realised that, with some clever shaping, a covered head could be faster through the air than a bare one.

Cloudy. Winds southerly 15 to 20 km/h becoming light in the evening. Sun protection recommended from 9:10 am to 4:40 pm, UV Index predicted to reach 8 [Very High] The chance of fog in the early ...