Bachmann 42904 HO Scale 33" Flatcar Back Wheel Set 22 Parts and its length sets how

and its length sets how much linkage travel you get for a given amount of servo rotation

so parts fit right into your existing station arrangement without modification

and one is leaning against a wall

and this one carries Unitrack nickel silver rail built in

Bachmann 42904 HO Scale 33" Flatcar Back Wheel Set 22 Parts and its length sets howBachmann 42904 HO Scale 33" Flatcar Back Wheel Set This is a Package of One 33" HO Scale Flat Back Wheel Sets by Bachmann. Suitable for Ages 14 & Up. FEATURES Replacement wheel sets with needle point bearings NMRA RP25 wheel contours Carded packaging INCLUDES One 33" HO scale flat back wheel sets SPECIFICATIONS Scale: HO 1 87