The RSR1’s clean 5-spoke design is a tribute to the original cast magnesium RSR Porsche wheels of the 1970s. But unlike the original, the Forgeline RSR1 is a modern custom made-to-order precision-machined forged aluminum version that combines the latest in advanced wheel technology, including one piece forged monoblock construction and I-beamed spokes to deliver head-turning good looks. The RSR1 is engineered exclusively for center lock applications and fits all Porsche center lock systems. The Forgeline RSR1 is a fully-forged one-piece monoblock wheel. Utilizing manufacturing technology similar to our very successful GS1R wheel, the concave 5-spoke design of the RSR1 looks great and allows plenty of room for caliper clearance and extreme brake fitment. The RSR1 is machined from a single forging of 6061-T6 aluminum. It is currently available in 18, 19, 20, 21, and 22-inch diameters. (Please Note: Depending on size, the RSR1 may be available in deep, medium, or shallow concave profiles.) And just like any Forgeline wheel, the RSR1 is available with fully customizable finish options. See more (including sizes and pricing) at: https://forgeline.com/wheel/rsr1