This Kinetic Magnetic trainer is the ideal trainer for lower-geared mountain and cyclocross bikes or for single speeds, BMX bikes and fixies. Simply dial-in the right amount of resistance no matter what gear yourre spinning with the Magnetics indexed thumb control. Riders looking for maximum resistance workouts in any cadence or gear will appreciate the magnetic resistance and heavyweight flywheel. Features: Indexed thumb shifter puts a maximum range of resistance at your finger tips Same frame and wide-diameter roller as Road Machine Trainer Quick release for easy bike mounting / dismounting 6.25 lb. (2.8 kg) flywheel THE largest in the industry gives a smooth, realistic ride Compatible with Pro Flywheel Ultra quiet Magnetic resistance unit is interchangeable with ANY Kinetic frame Lifetime Unconditional Warranty (Frame + Resistance Unit) The perfect trainer for: Mountain, cyclocross, BMX bikes, single-speed bikes and other bikes with lower gearing