Turn your bike into more than a fair weather friend with the CycleOps Wind bicycle trainer. The perfect solution for when it's too cold, wet, or dark to ride outside, the Wind trainer sets up easily and quickly for on the spot spins. To change resistance, simply shift gears like you would on the road. The vortex blade design generates progressive resistance and die cast zinc fan blades double as a heavy flywheel for fluid starts and stops. Training DVD included.