Forgeline GS1R Wheels (5 Lug)


Forgeline GS1R Wheels (5 Lug)


Call us any time at 844-438-7244 for Thunderhill-Exclusive

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Contact a wheel specialist today at 844-438-7244 to discuss the details of your custom Forgeline wheel build. We can guide you through sizing, offsets, finishes, and other details to make sure your Forgelines are perfectly suited to your needs!

Designed for professional racing teams competing in the IMSA WeatherTech GS class, the Forgeline GS1R combines the latest in advanced wheel technologies: 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, exceptional deflection stiffness, and very light weight.

Made from the same forgings and similar design as the popular GA1 street wheel, the GS1R has more material machined from the center area for additional weight reduction and improved access to the lugs. In combination with a new chamfered outer lip (with fewer sharp edges for easier handling), this open-lug design enables faster wheel changes and saves up to an additional pound of mass from each wheel.

The GS1R is currently available in 17, 18, 19, and 20-inch diameters with a range of widths and offsets. And just like any Forgeline wheel, the GS1R is available with fully customizable finish options.


  • One-Piece Forged 6061-T6 Monoblock Design
  • Concave Profile
  • I-Beamed Spoke Technology
  • Extreme Stiffness
  • Extreme Fatigue Strength
  • 2100-lb. Street Tire Load Rating
  • Light Weight (Up to One Pound Lighter Than The Standard GA1R)
  • Generous Brake Clearance
  • Open Lug Center
  • Customizable Finish Options
  • Legendary Forgeline Quality

(Note: this wheel does not accept a center cap. It is recommended for track use only.)

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Total price: $1,800.00