Dial-in just the right amount of resistance no matter what gear you"re spinning with the Magnetic"s indexed thumb control. This is the ideal trainer for lower-geared mountain and cyclocross bikes or for single speeds, BMX bikes and fixies. Riders looking for maximum resistance workouts in any cadence or gear will appreciate the magnetic resistance and heavyweight flywheel. Like all Kinetic trainers, the Magnetic trainer comes with the best warranty in the industry - lifetime unconditional warranty (Frame + Resistance Unit).