The product takes the most popular, high performance aluminum ball-race rollers from Item 15522 and provides them a tapered underside that can help your Mini 4WD car allow it to be until the end regarding the race!
• 17mm rollers are crafted in durable, accuracy aluminum.
• Tapered undersides encourage your car or truck getting back in the track if it climbs or lands upon the walls.
• Each has a 520-ball bearing built-in on center for super smooth rotation.
• Two screws and four aluminum spacers included.
• Compatible with Mini 4WD and Mini 4WD PRO automobiles. Some bodies may necessitate modification.
