This is a set of Soft Inner Foams for the HPI Baja. FEATURES: For use with the 170 x 80mm tires, HPIC4834 Soft firmness rating Black in color INCLUDES: Two Inner Tire Foams for the 170 x 80mm Baja tires REQUIRES: Installing inside tires SPECS: Width: 6.9" (176mm) Diameter: 6" (152mm) JiM 11.26.08 ir/jxs