This product takes the popular, high performance aluminum ball-race rollers from Item 15522 and gives them a tapered underside that will help your Mini 4WD car make it through to the end of the race!
• 17mm rollers are crafted in durable, precision aluminum.
• Tapered undersides encourage your car to get back on the track if it climbs or lands upon the walls.
• Each has a 520-ball bearing built in to the center for super smooth rotation.
• Two screws and four aluminum spacers included.
• Compatible with Mini 4WD and Mini 4WD PRO cars. Some bodies may require modification.
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