The HY/RD is the latest iteration of our industry-leading efforts to bring hydraulic performance to the developing road/cross disc market. Using an open hydraulic system it’s compatible with new cable actuated Shimano and SRAM road shift levers.    Features True 'plug-and-play' compatibility with existing cable actuated systems . Hydraulic reservoir provides automatic pad wear adjustment . TRP's own ultra-grippy semi-metallic pad that are Shimano M525/M515 compatible allowing for further customization . Compound works well in dry conditions but may wear quickly in wet/muddy conditions . TRP always recommend using 160 front . Flat Mount fitting. Mount Not Included.