Tamiya Double Aluminum Rollers ( 13mm -12mm ) Silver - 15398

★These lightweight versions of the popular double roller fit perfectly onto the front of the car, and facilitate stability through corners. At around 20% lighter than the regular Double Aluminum Rollers (13-12mm) , they will make a big difference to the weight of your car. This set includes 520 Ball Bearings and spacers, along with attachment screws.