These simple dual rollers are 13mm top and bottom and recommended for use on the rear of your Mini 4WD race car. They support the car if it leans, rolling on the lane wall. They are molded in low friction material and can be used in conjunction with separately sold 520 ball bearings, or bearing roller spacers, for a further performance boost. Small parts plus a wrench for attachment included.

• 13mm (top and bottom) Double Rollers x2
• Rollers are molded in low-friction POM plastic (blue).
• These simple double rollers are 13mm top and bottom and recommended for use on the rear of the car. They support the car if it leans, rolling on the lane wall.
• Can be used in conjunction with separately sold 520 ball bearings and bearing roller spacers, for a further performance boost.
• Screws and metal parts are included.
• Compatible with MA, VZ, and AR chassis cars. (Some chassis and bodies may require modification.)