RPM R/C Products brand Revolver Black Rock Crawler Wheels Wide Wheelbase from RPM Products. FEATURES: Black 10-hole pattern design Reinforced for strength and minimal weight Made of a nylon material Uses 12mm hex & max axle size = 6mm YOU WILL RECEIVE: Two 10-hole wide wheelbase black 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 chrome (RPMC8256) tlw 9/19/07 ir/jxs