The JohnDow Tire Taxi HD, No. JDI-TT1-HD, is designed to allow technicians to transport larger wheels and tires in an efficient and safe manner. The HD Tire Taxi has a diameter of 33" and is designed with 4" industrial casters to maneuver over rough, uneven surfaces. One of the casters can be locked for safe storage. The HD Tire Taxi holds four heavy duty wheels and tires with a load capacity of 552 lbs.