These Kadee/Barber S-2 70-Ton Roller Bearing Fully Sprung Metal Trucks are in HO Scale (Part # 380-518). They feature Code 110 (.110 wide) 33' smooth back 'standard' RP-25 wheels. Mount them with a #2 or 2-56 screw. The Barber S-2 truck, based on a 1967 prototype, has a design dating back to the late 1950s. It's been on the rails for over forty years, and you can still see them in use today. Ideal for almost any pre-1970 built 70-ton rolling stock. The trucks come with accurate markings, incredible prototype - true detail, non - magnetic metal wheels, highly flexible springs, metal side frames, and a fully sprung bolster. The smooth - tracking, free - rolling contoured insulated axles ensure great performance.

Using these trucks is easy. First, you can mount them using a #2 or 2 - 56 screw. They're designed to fit under almost any pre - 1970 built 70 - ton rolling stock. When using them, avoid exposing them to extreme conditions like very high heat or humidity as this could affect the metal parts. For maintenance, regularly check the wheels and axles for any signs of dirt or debris. You can use a soft brush to gently clean them. Also, make sure the springs are in good condition and not overly compressed. If you notice any issues with the tracking or rolling, check the alignment of the axles and make sure they're properly seated in the side frames.