Get this pair of HO scale 50-ton trucks from Kadee / A.S.F.® Ride Control® (Part # 380-552). The A.S.F.® A-3 Ride Control® 50-ton freight truck, introduced in the 1940s, is a pioneer of modern freight trucks. It features longer spring travel, no spring planks, and constant friction control to reduce excessive lateral roll and increase train speed safely. By 1949, ASF® sold over 140,000 sets. This AAR truck is great for modeling from the transition era up to 1994. Key features include Code 110 (0.110 wide) 33' smooth back'standard' wheels, self-centering design, accurate markings, high - detail, non - magnetic metal wheels, flexible sprung trucks, metal side frames, fully sprung bolster, smooth - tracking free - rolling contoured insulated axles, and RP - 25 free - rolling wheels. It mounts with a #2 or 2 - 56 screw.

Using these trucks is easy. First, you can mount them with a #2 or 2 - 56 screw on your model. When using, make sure the wheels are in good contact with the tracks for smooth running. As for maintenance, it's a good idea to keep the wheels clean. You can use a soft cloth to wipe off any dust or debris. Check the springs regularly to ensure they are still flexible. Also, be careful when handling the metal parts to avoid scratches. If you notice any abnormal noise or movement during use, stop and check the connections and wheels.