Intended use is Gravity/Downhill/Enduro/E-MTB Performace flow caliper offers increased oil flow speed for quicker response 4-piston hybrid design caliper is forged and CNC machined E2.3 rotor is required (2.3mm thickness) Aaron Gwin designed ergonomic lever blade with updated hydraulic leverage ratio for more power and less arm pump Tool-free indexed reach adjustment EZ-Plug system: pre-bled and plugged at both ends of the 5.0 x 1900mm hose (F & R); extra olive and barb included Performance Resin brake pads included Rotor and adapter sold separately Levers are I-Spec II compatible with no adapter MatchMaker adapters are sold separately All TRP hydraulic brakes use mineral oil