Turn your bike into more than a fair weather friend with the CycleOps' Mag+ Trainer. The perfect solution for when it's too cold, wet, or dark to ride outside. It uses magnetic fields to generate a wide range of adjustable resistance, perfect for cyclists determined to stay in shape year round. Its unique design incorporates a flywheel for an unbeatably smooth and quiet ride. Choose from 5 resistance settings for varied workouts. Plus, the bar-mounted remote shifter means you never break your cadence.