this rear derailleur features some of the finest technologies to keep you riding at the top of your game

Lowest profile of any trainer

magnetic head with twisting collar

impact and friction resistance

E8000 and EP8 compatible

Crank Brothers Mallet Trail BOA Clip-In Shoes - US 12 - Black - Gold Virtual Parent this rear derailleur features someSome things just work better together. Like an optimized shoe pedal combination. Crankbrothers Mallet clip in plays nice on the race track and at the bike park. It has a ramped Match cleat box for easy front and rear pedal entry and for mud shedding. A Race Zone setback on the cleat track allows the cleat to be positioned further toward the heel for added stability when descending. OUTSOLE: Match Box optimized for any MTB pedals Race Zone for control