Designed for securing motorcycles upright for Transporting, Maintenance, and Storage Effortlessly and securely supports the motorcycle in an upright position Accommodates front wheel sizes from 17-21in Can hold bikes weighing up to 1,200 lb. Works on pavement, gravel, concrete, dirt or even sand To remove, pull back on bike and chock will automatically release the wheel Motorcycle Wheel Chock can be used as a free standing floor stand or mounted to any flat surface.