National Type B-1 50-Ton Self-Centering HGC Trucks Code 110 (.110") 33�Õ Smooth-Back RP-25 Wheels 1 Pair by Kadee Quality products / HO Scale Two-piece fully equalized trucks mount with a #2 or 2-56 screw, sold separately. The self-centering action trucks self align themselves parallel with the car for easier placement on track. Truck Features: * Self Centering Action - Trucks self align themselves parallel with the car for easier placement on track * Code 110 (.110) 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