TIAGRA-grade BR-RS405 disc brakes sit under 105 and ULTEGRA level as dedicated products for road riding. Disc brakes give riders added confidence in wet weather, on long descents and in areas presenting hazards, so they make especially ideal companions for all types of active riding, an area where TIAGRA excels.
The BR-RS405 unit is designed with a flat mount brake caliper and a mechanical hydraulic shifting lever (ST-RS405). Completing the set is the SM-RT81-S/SS 140mm or 160mm rotor featuring Shimano’s ICE TECHNOLOGY cooling system, designed to dissipate heat and provide more braking power when you need it, as well as providing consistent braking performance in all weather conditions and with all rim types.
Shifting through TIAGRA’s 10 gears with the combined gear and brake unit is ergonomically pleasing for multiple hand sizes thanks to the smooth surface of the hood and the enclosed mechanism within. VIVID Index Shifting on the 10-speed shifting system equates to a light shifting effort with a defined click engagement, so you always know you’re in the right gear. Furthermore, the reach of the lever 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: