Fast Urban/Commuter - R7 Series. The Whitechapel is all about simplicity: a single chain ring and nine gears at the back will give years of reliable urban use.. Based on our high performance mountain bike geometry, all our Fast Urban bikes have a long wheelbase and relaxed head angle for high speed stability, and a shorter stem for excellent slow speed manoeuvrability.. A custom rear dropout allows us to mount the rear hydraulic disc brake caliper inside the rear triangle for easy fitment of a rack or mudguards.