The implications of Shimano‘s ST-RS685 dual control lever are significant. Whereas hydraulic disc brakes were previously only available when paired with Shimano’s Di2 upsets, by accommodating a mechanical shift mechanism and a mineral fluid reservoir beneath the lever hood, when previous room could be found only for reservoir and a D12 chip, Shimano have removed at a stroke the a expense of electronic shifting from those seeking only better braking.
Bicycle manufacturers have embraced the ST-RS685 with enthusiasm and a host of disc-equipped 2015 machines wear the lever, paired typically with the BR-RS785 caliper. Expect to pay £469.99 for a pair of ST-RS685 levers and BR-RS785 calipers. This system is compatible with Shimano’s SM-RT99 rotor a feature of the Japanese component giant’s flagship off-road group, XTR. The 140mm rotor is Shimano’s recommendation for road applications and these are sold separately for £49.99 each.