BMC Urbanchallenge UC01 Alfine 11 (2012)

Gates Carbon Drive System

Our new urban challenge bikes are sporty, reliable and suitable for everyday use – the perfect tool for commuting, getting about the city or a leisure ride – attractive, fast and light. The Gates Carbon Drive System runs silently, needs no maintenance and is incredibly efficient.

The frame can be divided at the seat stay, for ease of fitting/removing the belt. We have used an eccentric bottom bracket/inner bearing to avoid the need for an external chain take-up; this arrangement allows the Gates Carbon Drive System to be perfectly tensioned.