Pingel Series E Track Wheel Chock System WC65ER Fits Tire Widths up to 6-1/2 Recess Mount Fits Tire Widths up to 3-1/2 Recess Mount Allows you to locate your motorcycle anywhere along the track for best position Multiple motorcycles can now be quickly and easily installed in your trailer with optimum space utilization With Series E Track already in place, there is no further hardware to install