Code 110 (.110") 36" Smooth-Back RP-25 Wheels 1 Pair
Walthers Part # 380-513, 
HO scale, 

 
Metal fully sprung equalized trucks mount with a #2 or 2-56 screw, sold separately.
 
The ASF(R) 100-ton roller bearing tuck is from the modern diesel era. It has standard 36" wheels and a longer wheelbase than the 50- or 70-ton roller bearing trucks. This model is a faithful reproduction of the American Steel Foundries Ride Control truck. This truck is currently in use under a variety of rolling stock in North America
 
Truck Features: * Code 110 (.110) 36" smooth back wheels
 
* Accurate markings
 
* Incredible detail true to prototype
 
* Non-magnetic metal wheels
 
* Highly flexible sprung trucks
 
* Metal side frames and fully sprung bolster
 
* Smooth tracking free rolling contoured insulated axles
 
* RP-25 free rolling wheels