Ball Bearing wheels eliminate all the drag on the curves from rolling on 2 different diameter rails and eliminate skidding and dragging and eliminate wearing out the rails. Your locomotives can pull more cars with less power and also have much longer life on the gearboxes. Your trains will no longer slow down on curves.
The finest G-Scale BALL BEARING wheels made. Solid BRASS and then Silver Plated and they have STAINLESS STEEL AXLES so they cannot rust and they are double insulated. These wheels are the same size as the plastic wheels on most G-Scale trains. These fit all USA Trains, all Bachmann standard length cars, all Aristo-Craft standard cars, all LGB, all Hartland, all Delton and all Buddy L. Some slight axle end hole opening may be required on certain LGB or Aristo products as well as possible brake shoe trimming. It is quick and easily accomplished and well worth the effort.