BP Modified Gearing Systems

We offer gearing solutions for all Brompton bikes, organized according to the existing rear hubs or the rear hubs that you intend to use.
The 2 speed bikes is referred to as external/derailleur gearing, while both the 3 speed and 6 speed bikes are based on the internal gear hubs. The Sturmey Archer 5 speed hubs available aftermarket are also categorized under the internal gear hub