This is the Revolver Chrome Rock Crawler Wheels Wide Wheelbase from RPM Products. FEATURES: Chrome 10-hole pattern design Reinforced for strength and minimal weight Made of a nylon material Uses 12mm hex & max axle size = 6mm INCLUDES: Two 10-hole wide wheelbase chrome wheels One RPM decal REQUIRES: Installation on tires Tire Glue DTXR2000, DTXR2002 SPECS: Diameter: 2.44" (62mm) Width: 1.61" (41mm) Backspacing: .28" (7.1mm) Wheel Hex: .47" (12mm) Min. Axle Length: .42" (10.5mm) from the hex face to the end of the axle Max. Axle Dia.: .196" (5mm) COMMENTS: Also available in black (RPMC8255) tlw 9/19/07 ir/jxs