Quality carbon fiber processing, injection clamp ring 12mm aluminum alloy hex hub Light weight high strength design 4 styles available Fits 2.2" tires MOA competition crawler and other 1/10 rc crawler Need to assemble Specification: Wheels Size: 2.2 Inch Clamp Ring Diameter: 67.5mm Beadlock Ring Diameter: 64mm Inter Diameter: 47mm Width: 30mm Center Hole: 6.8mm Positive offset: 2.5mm Material: Lock Ring: carbon fiber Clamp Ring: plastic Hex Hub: Aluminum alloy Support Column: Aluminum alloy Each Weight: A: 44g B: 43g C: 41g D: 46g What's Included 4 Pcs * 2.2" Carbon Fiber Wheel Rims