This can be a lightweight 17mm aluminum ball-race rollers being available these days to tune your Mini 4WD car. These rollers offer less fat and a little boost in rate, along side superior durability and silky-smooth rotation.
• 17mm Lightweight Aluminum Ball-Race Rollers x2
• Eight holes in each roller result in you weight of 0.81 grms, a saving of around 0.25 grms per roller.
• small components for accessory are included.
• built-in 520 ball bearings provide smooth roll.
• right for Mini 4WD and Mini 4WD PRO automobiles. Some figures may need modification.