The TRP DH-R EVO brings updated braking technology for gravity, downhill, enduro, and E-MTB riding. Brake lever features a forged, CNC&';d polished lever body Ergonomic, Aaron Gwin designed, alloy lever blade with dimpled accents for better grip on the trail Advanced 9mm internal brake lever piston Adjustable lever reach Forged/CNC&';d high flow polished caliper features 4 hybrid pistons and is designed specifically for use with a 2.3mm rotors High-performance resin pad compound offers increased heat stability and a shorter bed-in process Stiff 5.0mm hose for easier internal routing and better transfer of hydraulic power Rotor and adapter sold separately If you need help finding the right brake adapters for your new brake and rotor setup, check out our Brake Adapter Fitment Guide to make sure you get the right adapters! Mount your MatchMaker shifter and dropper levers directly to your brake levers with the HD3.7 adapters, or mount your I-Spec EV shifters and dropper levers directly to your brake levers with the HD4.0 adapters! No adapters needed to mount I-Spec II shifters and dropper lever directly to lever.