Originally designed for professional racing teams competing in the IMSA 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.
We have listed this with the common square track wheel sizes and offsets for E46 M3, E9X M3, E82 1M, and F22 M235iR/M240iR. These are the preferred widths to run track tires in the typical 265-295 widths. Note that these are aggressive fitments and not recommended for street use. Contact us if you're not already familiar with fitting aggressive rubber for track use.
18x9.5 ET22
18x10.0 ET25
18x10.5 ET27 (recommended only for E9X M3)
Additional sizes and offsets also available (inquire).
GS1R features:
- 1-piece monoblock forged
- Concave profile
- I-beam spoke machining
- Knurled bead seat
- Excellent strength
- Light weight
- Generous brake clearance
- Multiple finish options
- Made in USA
Colors: multiple colors available (limited only by your imagination) but we only display select colors. Contact us for a color or finish not listed.
Center Cap: as a true track wheel, it's not designed to use a center cap
Fitment Note: we do our best to display wheels that fit your BMW model, based on your model selection. Many variables must be considered for wheel fitment, especially when using larger wheels or different offsets. These variables include: suspension type and settings, ride height, tire size, bodywork changes, and alignment settings. In some cases, additional parts or modifications may be necessary for fitment that may not be listed in our catalog. Final wheel fitment and clearance is the responsibility of the customer, however, we welcome your questions on fitment, size, offset, or other wheel-related inquiries. Wheel returns are limited to quality issues only.
