Quote:
Originally Posted by 72GMC
Giersen,
ISC coilovers with integrated camber plates.
10kg/560lb front, 12kg/672lb rear springs.
Currently a square set-up with 18" x 8.5" ET37, and 3mm spacers.
Nankang CR-S 255/35R18, which has a tread width of 10.1"
No rubbing against front suspension or fender. Or rear for that matter.
But this Nankang tire seems too wide for the 8.5" rim.
For the proposed 9.5" wide rims, I would be looking at the same 255/35 Nankang or the 265/35 which has a 10.5" tread width.
Or Goodyear 3R in 265/35 (9.5" tread width) or 275/35 (9.8" tread width)
Or Maxxis RC-1, 265/35 or 275/35
Or Conti Extreme Force, 275/35 10.0" tread width
Thanks
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Hi there,
Thank you for the run-through and additional info on your car!
For the 18x9.5" ET35 square setup using 265/35-18 tires on the non-M E9X chassis, typically a 5mm front spacer will be required to clear linear spring motorsport-focused coilovers. With the additional front spacer, front race-spec camber plates will also be required to dial-in around -3.0 to -3.5 degrees of front camber to ensure a poke and rub-free fit. The actual camber required will depend on your ride height and specific tire selection. In the rear, this setup will not require any additional mods or spacing.
If you opted for the lower offset 18x9.5" ET28 square setup with 265/35-18 tires, you will be able to fit that wheel up front without any additional spacing. However, the ET28 will be 2mm more aggressive up front than the ET35 W/ 5mm spacers, so some additional front negative camber may be required in comparison. In the rear, the ET28 will be 7mm more aggressive than the ET35, which may require a rear fender roll or some additional rear negative camber to fit a 265/35-18 track tire without rubbing.
275/35-18 tires can also technically be used with both setups with additional negative camber to fit but that tire size will be a bit more difficult to make work on the ET28 due to the reduced offset compared to the ET35.
If you have any other questions, please let me know.
-Geirsen