Get a pair of Kadee / A.S.F.(R) 100-Ton Metal Trucks in HO Scale, Part # 380-555. These trucks feature Code 110 (.110) 36 smooth-back RP-25 wheels. Mount them with a #2 or 2-56 screw. From the modern diesel era, they have 36-inch wheels and a longer wheelbase than 50 or 70-ton trucks. A faithful reproduction of the American Steel Foundries® Ride Control® truck, they're in use under various North American rolling stock. The trucks come with self-centering, accurate markings, and incredible detail. They have non-magnetic metal wheels, highly flexible sprung design, metal side frames, and a fully sprung bolster. Plus, they offer smooth tracking with free-rolling contoured insulated axles and RP-25 free-rolling wheels.

Using these trucks is easy. First, make sure you have a #2 or 2-56 screw to mount them properly. You can install them on your rolling stock according to your model's requirements. When using, keep in mind that these trucks are designed for HO scale models, so they should be used with appropriate track systems. For maintenance, regularly check the wheels and axles for any signs of wear or dirt. You can clean the wheels gently with a soft cloth to keep them rolling smoothly. Avoid using harsh chemicals as they may damage the metal parts. Also, store the trucks in a dry place when not in use to prevent rusting.