Based upon our original 5-lug GS1, the GS1-6 is a 6-lug street-friendly version of our extremely successful GS1R racing wheel that has carried many top-level professional road racing teams to victory! The Forgeline GS1-6 combines the latest in advanced wheel technology, including one piece forged monoblock construction, motorsport engineered design, and I-beamed spokes. And just like the GS1R, the GS1-6 is engineered to withstand the rigors of top-level endurance racing with a 2100 lb street tire load rating and exceptional deflection stiffness. See more (including sizes and pricing) at: https://forgeline.com/wheel/gs1-6/