This wheel-mount, electromagnetic bike trainer is a great alternative to an expensive indoor biking system - since it allows you to ride your own bike. Resistance is based on cadence, speed, and power data gathered as you ride.

This cassette-mount, electromagnetic bike trainer is a great alternative to an expensive indoor biking system - since it allows you to ride your own bike. Resistance is based on cadence, speed, and power data gathered as you ride.

This cassette-mount, electromagnetic bike trainer is a great alternative to an expensive indoor biking system - since it allows you to ride your own bike. Resistance is based on cadence, speed, and power data gathered as you ride. Cassette included.