TIAGRA-grade disc brakes (BR-RS405) with hydraulic calipers were announced today, giving riders the option of four SHIMANO road disc brake models to choose from.
Following the release of ULTEGRA-grade and 105-grade hydraulic disc brakes in 2015 and SORA-grade mechanical disc brakes in March 2016, Shimano now offers its fourth flat mount dedicated road hydraulic disc brake offering with today’s announcement of the BR-RS405 components.

The new TIAGRA-grade BR-RS405 hydraulic disc brakes are positioned below 105 and ULTEGRA level road brake system.

The BR-RS405 unit is designed with a flat mount brake caliper and a mechanical hydraulic shift lever (ST-RS405). Completing the set is the SM-RT81-S/SS 140mm or 160mm rotor featuring Shimano’s ICE TECHNOLOGY cooling system that dissipates heat and provides more consistent and powerful braking performance in all weather conditions.

Shifting through TIAGRA’s 10 gears with the ST-RS405 combined shift and brake lever is ergonomically pleasing for multiple hand sizes thanks to the smooth surface of the hood and its enclosed mechanism. VIVID Index Shifting on the 10-speed shifting system creates a light shifting effort with a defined click engagement. The lever reach can be adjusted by up to 10mm, providing added comfort.

The chart below shows a side-by-side comparison of Shimano’s shifting and disc brake systems:

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.

ST-RS405 and BR-RS405 hydraulic disc brake components will be available as an aftermarket purchase in July 2016.