MAT PROCESS: Shaping by the MAT process reduces wheel weight by 10%-15%. Every pound of unsprung weight savings has the effect of reducing overall vehicle weight by 20lbs. F1 REPLICA: Enkei is an official supplier of the McLaren Mercedes Formula One Team.  The RPF1 was developed using the same technology as the Formula One race wheel. TWIN SPOKES: Enkei's dual open stance spoke design is used on the McLaren Mercedes Formula One race wheel.  The twin spokes achieve better stress dispersion on curves, hard braking, and extreme race driving. CENTER DESIGN: Enkei's pocket design around the bolt circles increases rigidity and keeps the wheel cooler during aggressive race driving. Features: Available in the following sizes: 16"x7" 17"x7.5" 17"x8" 17"x9" 18"x7.5" 18"x8" 18"x9" 19"x8" Available in Silver and Gold Reduces overall weight by 20LBS Spec-E Inspected What's Included: Enkei RPF1 wheel