These are Kadee Self-Centering ASF 100-ton Roller Bearing Trucks. Features: * Precision engineered with prototypical details. * These are faithful reproductions of the American Steel Foundries Ride Control truck. * Fully sprung trucks with metal sideframes and bolsters. * Non-magnetic, 36" blackened metal wheels with smooth backs and RP25 contour design. * Free rolling contoured insulated axles. * Factory assembled. * Made in the USA.
...more about the Kadee Quality Products Self-Centering Trucks -- Roller Bearing w/36'' Smooth Back Wheels (Diesel-Era) - HO-Scale