Hydraulic/Mechanical caliper that is compatible with most Shimano and SRAM 11 speed road shift levers True `Plug-and-Play` compatibility with existing cable actuated systems Hydraulic reservoir automatically compensates for pad wear Features TRP�s own semi-metallic pad but is also compatible with Shimano M525/M515 pads Rotors, adapters, and flat mount mounting bolts sold separately All flat mount calipers being mounted to the fork require the FF-5 Front Flat Mount 140/160mm adapter 205g per caliper Frt or Rr No Rotor Grey Mineral Oil 205g Flat Mount