Quote:
Originally Posted by Andyh1
I'm running stock staggered set up but really looking at upgrading to these arc-8 rims.
I really like the concave look on my black z4m. (satin black rims)
Current set up:
225/45/18 F
255/40/18 R
Looking at your concave sizes, will 18x9.5 all around work with my existing tires?
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Thank you for the post! The 18x9.5 ET35 is going to be quite aggressive up front, and not recommended. For your Z4M, we recommend the following fitment as a direct bolt on:
- F: 18x8.5" ET38 (Profile 1) - 235/40-18
- R: 18x9.5 et22 (Profile 3) - 275/35-18
For customers wanting to run a concave wheel up front, then we recommend the following fitment:
- F: 18x9" ET30 (Profile 3) - 235/40-18 (negative camber needed)
- R: 18x9.5" ET22 (Profile 3) - 275/35-18
You could reuse your original tires, but they will be quite a bit stretched. The front 18x9" ET30 will be close to the outer fenders on the Z4M with 235/40-18 tires and would require around -1.8 degrees of camber or more. The 18x10 ET25 will also work in the rear, but it will be very close to the fender. Depending on what tire brand/compound you use and the ride height, you may need a minor fender roll.
Let me know if you have any other questions! I'm happy to assist.
-Matt