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. | 
