Rock & Roll II Description The Rock & Roll delivers natural side-to-side motion with lateral movement to engage core muscles & maintain balance. Simultaneously work on technique & power especially during out-of-the-saddle hill climb intervals. Just like riding outside — pedal harder resistance is harder New trainer designs fit 29 mountain bikes All new Rock & Roll design Lifetime Warranty Patented side-to-side motion Progressive resistance from 5 watts to over 2000 watts Pairs with Kinetic in Ride Watt Meter for power training Add Turntable Riser Ring for the best ride feel