This is a pair of Hard Rear Tires for the Tamiya F104, F104X1 and F104 Version II. Chassis. FEATURES: Fits the #54400 standard F104 wheel (TAMC4400) and the #51378 (TAMC4711) spare wheel set High traction, hard compound rubber for excellent traction and long wear characteristics INCLUDES: Two Hard Rear Tires with Foam Inserts REQUIRES: F104 Wheels, TAMC4400 or TAMC4711 Tire Glue DTXR2000, DTXR2002 SPECS: Width: 1.2" (32mm) Diameter: 2.4" (62mm) jxs 10/11/12 ir/jxs