Genesis HO scale American Steel Foundries ''Ride Control'' 100 Ton trucks are molded in low friction Celcon for smooth operation and accurate detail. These 5' 10'' wheelbase trucks have non-magnetic, contoured semi-scale .088'' wide 36'' wheels with realistic rotating bearing caps. They are appropriate for use on a variety of freight car types of 80 to 120 ton capacity including box cars, open and covered hopper cars, tank cars, and gondolas.