This will be a lightweight 17mm aluminum ball-race rollers that are currently available to tune your Mini 4WD automobile. These rollers provide less fat and hook boost in speed, in addition to superior durability and silky-smooth rotation.
• 17mm Lightweight Aluminum Ball-Race Rollers x2
• Eight holes in each roller make for an individual weight of 0.81 grms, a saving of roughly 0.25 grms per roller.
• tiny components for accessory are included.
• integrated 520 ball bearings offer smooth roll.
• Compatible with Mini 4WD and Mini 4WD PRO automobiles. Some systems may require modification.
