Marson USA 5.5" Motorcycle Wheel Chocks T200-ETRACK - HDB This listing includes one wheel chock, one etrack mounting plate, and the hardware. Side support straps for extra strength and durability. E track sold separately. Constructed of 1" heavy duty steel tubing. Black powder coated for a sharp appearance. Dimensions: Exactly 8.25" wide at the opening and 5.5" wide at the start of the radius x 9.25" high.