The Bettendorf Double Truss Truck was introduced in the 1930s by U.S. railroads and was allowed to be used in interchange service through 1993. The Kadee #500, #502 & #550 represent 50 ton trucks for 100,000 pound cars,
 
Self-centering action trucks self align themselves parallel with the car for easier placement on track. Mounts with a #2 or 2-56 screw. 2-piece fully equalized trucks. 1pair.
 
Truck features:
 
*Self centering action
 
*Code 88 (.088) 33" smooth back wheels
 
*HGC weighs nearly the same as metal trucks
 
*Superior rolling ability
 
*Brake pads
 
* Accurate markings
 
*Incredible detail true to prototype
 
*Non-magnetic metal wheels
 
*Highly flexible fully equalized trucks
 
*Smooth-tracking free-rolling contoured insulated axles
 
*RP-25 free rolling wheels