These are Double Aluminum Rollers that are used for Mini 4WD racing machines. They are used to tune the Mini chassis to achieve better stability and higher cornering speeds. This particular version is a limited edition variant which is lightweight compared to the previous release of item 15403.


•With the 9mm roller in the lower position and the 8mm roller in the upper position�� it improves stability greatly and also enhances cornering ability.
•Friction is minimal when the aluminum rollers make contact with the course track walls�� allowing for faster speeds.
•Can be used with any Mini 4WD and Mini 4WD PRO machine.