* Uses the same frame and wide-diameter as the Road Machine 2.0* 6.25lb flywheel, largest in the industry, allows for a smooth and realistic ride* Index thumb shifter puts precise resistance at your fingertips* Ideal trainer for lower-geared MTB and Cross bikes* Compatible with all 22''-29'' diameter wheels* Wheels smaller than 22'' outside diameter require Small Wheel Adapter, sold separately* Resistance unit (RU) tension system eliminates bending of framesand L-bolts from overtightening