The Kinetic Rock And Roll 2.0 Bike Trainer offers quiet, fluid-based progressive resistance with a unique feature—a pivot that replicates side-to-side motion to help improve technique. Features Side-to-side motion engages core muscles to maintain balance and lets you refine your technique when simulating out-of-the-saddle hill climbs Quiet, smooth, progressive resistance replicates the feel of an outdoor ride: as you pedal faster, the resistance increases thanks to a leak-proof fluid mechanism Rubberized, grippy knobs and sturdy design offer excellent stability The Kinetic Rock And Roll 2.0 Bike Trainer features a larger-than-average roller to reduce tire wear Compatible with all bikes with 22 - 29 in. diameter wheels and up to 29 x 2.4 in. tires Range of resistance from 5 - 3,000 watts Technical specs Best Use Cycling Resistance Type Fluid Dimensions 27 x 24 x 10 inches Weight 41 pounds