Minoura Live Roll R800 with Foot Step Bicycle Roller - 400-3800-00 A heavy and wide roller with steel covers attached. Can be used for smoother and higher-speed rotation practice over other smaller diameter rollers Matched wheelbase adjustability with continuous adjustment on frame Uses a high-rigidity and lightweight aluminum frame with front Drop roller that adjusts the middle roller to provide a safe spin even at high rpm's Feet and footrest are height-adjustable at six points 22W x 6h x 52D (inches)