CycleOps Magnetic Remote Shifter for CycleOps Indoor Mag Bicycle Trainers Internalized flywheel design fo smooth and quiet ride Magnetic fields create a wide range of adjustable resistance levels-flip lever to control resistance by moving magnets in relation to flywheel Mag+ comes with remote shifter to adjust resistance For standard Mag trainers Adjust resistance without leaving the saddle Quick release mounting system fits most stems Adapable to model 9005