These are Double Aluminum Rollers that are used for Mini 4WD racing machines. They are used to tune the chassis to achieve better stability and higher cornering speeds. This version is a limited-edition variant which is lightweight compared to other double rollers.
FEATURES:
- Double Aluminum Rollers (Red) x2
- 520 Ball Bearings x4
- Nearly 20% lighter than standard Double Aluminum Rollers (13-12mm).
- 520 ball bearings provide silky smooth movement.
- Small parts for attachment included.
- Compatible with Mini 4WD and Mini 4WD PRO cars. | 
