These are the optional Front Sponge Tires for use on the Tamiya F104 Chassis Vehicles. FEATURES: Sponge construction Black in color INCLUDES: Two Front Tires REQUIRES: Installation on wheels SPECS: Outer Diameter: 59.5mm (2.3") Inner Diameter: 41mm (1.6") Width: 28mm (1.1") cnh 9/30/09 ir/jxs