Thank you for viewing. Type... Mini 4WD Wheel Type: Small-diameter low-height (medium-diameter) Y-spoke wheel (carbon) Tire Type: Super Hard Black Tire Diameter: Approximately 23.5mm [To Buyers] We have spent time adjusting these to maximize the benefits of the pen-shaped tires. Power up your machine and set yourself apart from the competition! The tires were rotated with a rotary tool and chamfered with a 400-grit diamond plate file, then leveled with 1000-grit sandpaper, and finally finished carefully with gallium cleaner and a melamine sponge. Notes ・All parts are made using genuine Tamiya products. ・This is a handmade product. Please refrain from purchasing if you are sensitive to scratches, wobbles, or deformations that may occur during processing. Please also refrain from purchasing if you are particular about accuracy, as there may be errors in the measurement method due to the force applied by the calipers. We also sell various other Mini 4WD parts. Please take a look.