The Enkei RPF1 wheel was developed using the same technology as the Formula One race wheel. F1 REPLICA: Enkei is an official supplier of the McLaren Mercedes Formula One Team. 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. 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.Features 15x8 4x100 PCD +28 offset 75 hub bore diameter SBC (Special Brilliant Coating) color (chrome black like) 2 x Enkei decals per wheel (not pre-applied) 4 x blue aluminum air valves included Spec-E Inspected MAT Technology Also available in 16", 17", 18", and 19" sizes Note: 15" RPF1's do not come with a center cap but are available separately. PRICE IS FOR A SET (4 wheels).