Shimano continues to expand its road hydraulic disc brake arsenal with the introduction of its new Tiagra-grade hydro disc components. The BR-RS405 brakes are Shimano’s fourth flat-mount road hydraulic offering, follow the release of Ultegra and 105 hydraulic disc brakes in 2015.
The new Tiagra hydraulic disc brakes are positioned below Shimano’s 105 system. The unit is designed with a flat-mount brake caliper and a mechanical hydraulic shift lever (ST-RS405) along with a 140mm or 160mm rotor (SM-RT81-S/SS). These rotors feature Shimano’s Ice Technology cooling system that the company claims dissipates heat and provides more consistent and powerful braking performance in all weather conditions.
Tiagra’s 10-speed shifters offer lever reach adjustment up to 10mm and Shimano’s familiar light-action shifting.
Shimano’s ST-RS405 levers and BR-RS405 brakes adopt the easy setup and maintenance technology like funnel bleeding, used in other Shimano hydraulic brake components.
Tiagra hydraulic disc brake components will be available as an aftermarket purchase in July 2016. Pricing has not yet been set, but it should be Shimano’s least expensive road hydraulic offering. Shimano also announced a Sora mechanical disc brake group recently, which sits below Tiagra in the hierarchy.
Originally posted at Velonews.com