Combining the real ride feel of Kickr with the natural motion of rollers Kickr Rollr smart bike roller trainer makes it easy to transition from outdoor riding to indoor cycling. The front safety tire gripper can accommodate tires up to 2.1`` (53mm) to keep your bike upright and secure making it easy to get on and off the bike while providing stability even when sprinting. Kickr Rollr features a 10.5lb flywheel that when combined with the dual-roller technology provides riders with the precise inertia necessary to replicate the feeling of riding on the road. Dual-roller design frees up the rear wheel to move naturally providing an experience that feels more like riding outdoors while reducing tire slip. Connect Wahoo Speedplay Power Pedals or other ANT+ power meters to Kickr Rollrto get the benefits of training with power (sold separately). No more fussing with thru axles or removing your rear wheel simply adjust the wheel base secure your bike and ride. Connectivity: ANT+ ANT+ FE-C Bluetooth Direct Connect. Maximum Power Output: 1500 Watts. Maximum Simulated Grade: 10%