These are optional Rubber Rear Tires for the Tamiya F104 Ferrari Kit. FEATURES: Slick design Foam inserts INCLUDES: Two Rubber Rear Tires for the Tamiya F104 Two foam inserts REQUIRES: Installation on Wheels Tire Glue DTXR2000, DTXR2002 SPECS: Outer Diameter: 64.5mm (2.54") Inner Diameter: 45mm (1.77") Width: 33.5mm (1.32") COMMENTS: If using with the F104 Pro chassis, the #51398 Mesh Wheels, TAMC2541 must be used lmm 01.05.10 ir/jxs