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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.


The star of Forgeline's Motorsport series, the GS1R is a forged, monoblock wheel built to survive the highest levels of motorsport. 


These wheels are made to order and as such can be customized for your needs.


Available in sizes from 17" to 21" and widths from 8.5" to 13", with 40+ color options we can build a set just for you.


Pricing is listed for the most popular configuration for 991 GT cars: 

19" x 10" front

19" x 12" rear


When running a 19" wheel on a 991 platform, it is recommended to replace the lower control arm bolt with OE Porsche part# 99907353001.


Due to the extremely close tolerance to the stock Porsche brake caliper, it is recommended that you swap to a track-focused kit like the PFC Track Day Kit as to not mar the finish of your stock brakes.


Please reach out to us directly to finalize your sizes and wheel finish when placing an order. Thank you!