Originally designed for professional racing teams competing in the IMSA Continental Tire SportsCar Challenge Grand Sport (GS) class, the Forgeline GS1R combines the latest in advanced wheel technology, including one piece forged monoblock construction, motorsport engineered design, and I-beamed spokes. This wheel is engineered to withstand the rigors of top-level endurance racing with a 2100 lb street tire load rating and exceptional deflection stiffness.
19in & 20in Fitment Available for GT4 & Spyder
Fits GT4 Steel Brakes & PCCB
Add Knurled Lips for track wheels to prevent tires from rotating under heavy braking.
19 Inch Fitment: 19x9.0 Front & 19x10.5 Rear (clear OE or aftermarket rear toe links)
Recommended Tire Size: 255 or 265 Front and 285 or 295 Rear
20 Inch Fitment: 20x9 Front & 20x11 Rear
Recommended Tire Size: 245 or 255 Front and 295 or 305 Rear