#516 Vulcan Double Truss Trucks with Ready-to-MountWhisker®Couplers, 33" Ribbed Back Wheels - HO ScaleMetal Fully Sprung Equalized Trucks TheWhisker®couplers will need to be assembled on to the trucks coupler bottom plate. Mounts with a #2 or 2-56 screw.Mounting Screws not Included. The Vulcan truck was introduced in the 1920's as another replacement for the arch bar truck. The Vulcan design incorporated a pin which held the journal box in place. Removal of the pin allowed the journal box to be quickly replaced. This truck lasted to the end of the steam era on mainline railroads and somewhat longer on logging railroads. HO-Scale Metal Fully Sprung Trucks Features: Ready-To-Mount #148 Metal Whisker® Couplers Code 110 (.110) #523 33" Ribbed Back Wheels 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 Plastic Axles RP-25 Free Rolling Wheels #637 HO Scale Truck Springs Package Includes: (2) Each #516 Vulcan Double Truss Trucks with Coupler Platform (assembled) (2) Each #148 Metal Whisker® Couplers (2) Each Coupler Gearbox (2) Each 0-48 Screw (2) Each Insulated Bushing (2) Each #209 Gray Insulating Fiber Washers .010" (2) #622 Knuckle Springs The term Code 110 and Code 88 relates to the width of the wheels and has no relationship to track code. Code 110 wheels are .110" wide and Code 88 are .088" wide. Code 110 wheels are the common (or "Standard") width wheels and Code 88 are what is called "Semi-Scale" and are used when the modeler wants a more prototypical looking wheel width. Actual HO-Scale prototypical wheel width would be around .067" wide and although they will run OK on the average track they will not go through common turnouts and crossings. Code 88 (.088") is just about the minimum width of wheel that will run on most standard or common track if gauged correctly. It really is a matter of appearances because there's very little operational differences between running Code 110 or Code 88 wheels. Code 88 wheels look really good and are most noticeable on open frame cars like hoppers and tank cars. However, they also look great on boxcars, gondolas, and reefers but not quite as noticeable. As mentioned above track code and wheel code have no relationship meaning Code 110 and Code 88 will run on most any code of track. Track code is simply the measured height of the rail, code 100 is .100" tall, code 83 is .083" tall, code 70 is .070" tall, and so on.
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