These are the Rear Revolver 2.2" Wheels from RPM for use on the Traxxas Electric Rustler and Stampede. FEATURES: Plastic construction Black in color 10-hole design INCLUDES: Two Rear Revolver 2.2" Wheels REQUIRES: Tires Installation on the vehicle SPECS: Width: 49.35mm (1.9") Diameter: 61.75mm (2.4") Hex: 12mm cnh 2/6/09 ir/jxs