The largest size of the 20″ wheel models in the Race Lite series is the Pro XL model. The 21″ top tube frame accommodates larger racers who need more front end room while the rest of the geometry and frame spec carries forward from the Pro model. Also found on the Pro XL are the same high performance sealed bearing wheel set, 2 piece alloy cranks, PTC with press fit BB86 sealed bearing bottom bracket and fork/bar/stem front end controls as the Pro.