This is a Gold rollers set for use on Mini 4WD machines. Aluminum rollers are fitted with ball bearings which ensure minimal speed loss when bouncing off Mini 4WD racing circuits
• Lightweight 19mm Aluminum Ball-Race Rollers x2
• 6 holes opened in the rollers cut around 30% of their weight.
• Built-in 520 ball bearings ensure silky smooth rotation.
• Compatible with all Mini 4WD and Mini 4WD PRO cars (some bodies may require modification).