These are the Pro-Line 2.2"/3" Slingshot SC Tires for use on the Traxxas Slash, Slash 4x4, Slayer, Associated SC10 and the HPI Blitz. FEATURES: Rubber construction Molded foam inserts INCLUDES: Two 2.2"/3" Slingshot SC Tires and Foam Inserts REQUIRES: Wheels SPECS: Outer Diameter: 115mm (4.5") Inner Diameter: 56mm/79mm (2.2"/3") Width: 50mm (2") cnh 12/9/09 ir/jxs