Kadee HO Scale 552 A.S.F Ride Control 50-Ton Trucks with 33" Smooth Back Wheels - Self Centering

33" smooth back wheels Accurate markings Incredible detail True to prototype Non-magnetic Metal wheels Highly Flexable sprung trucks Metal SideFrames & Bolsters Fully Sprung Smooth tracking Free rolling Contoured Insulated Axes RP-25 Free rolling wheels

The A. S. Foundries® A-3 Ride Control® 50-ton freight truck was introduced in the 1940's and is one of the forerunners of modern freight trucks. Features embodied into this design include a longer spring travel, no spring planks and constant friction control using friction castings in the bolster to dampen excessive lateral roll of the car. These design features allowed for a higher train speed with less danger of derailment than previous designs. ASF® sold over 140,000 sets by 1949. This truck is excellent for modeling the transition era up to 1994 when friction bearings were no longer allowed in interchange service.

Features:

• Code 110 (.110 wide) 33" smooth back "standard" wheels
  
• Self-Centering
  
• Accurate markings
  
• Incredible detail True to prototype
  
• Non-magnetic Metal wheels
  
• Highly Flexible sprung trucks
  
• Metal SideFrames & Fully Sprung Bolster
  
• Smooth tracking Free rolling Contoured Insulated Axles
  
• RP-25 Free rolling wheels
  
• Patent numbers 5,832,837 & 5,768,999