These are brand new, tapered variations of this smooth-spinning ball bearing rollers from Item 15464 JR HG Alum Ball-Race Rollers 19mm (Ringless). Tapering them encourages the car to remain on program when it mounts the walls, with all the goal of raising your race completion price!
• Tapered Aluminum Ball-Race Rollers (Ringless) x2
• integrated 520 ball bearings give smooth rotation.
• Screws and spacers to be used in accessory are included.
