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. Kadee's #500, #502 & #550 represent 50-ton trucks for 100,000 pound cars
 
Truck Features:
 
* Ready-to-mount metal Whisker(R) couplers
 
* Code 110 (.110) 33h 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
 
Mounts with a #2 or 2-56 screw (sold separately).