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      12-31-2018, 07:29 PM   #1
nachob
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Drives: 2004 330i ZHP, 2022 Cayman T
Join Date: Apr 2008
Location: California

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Anyone run F80 M3 18" sizes on 1M?

I'm thinking of going 18" on current 1M. I originally had 18x9 ET 31 and 18x10 ET25 APEX EC-7s with stock sizes on my previous 1M but sadly sold them when I sold the first car. They were 245/40/18 front and 265/40/18 rear. This set up was outstanding. Made the car a little less darty on bad roads and handled very well and rode better.

I really would like to try a set of BBS RIA wheels but they only come in 18x9.5 front and 18x10.5 rear so I would need to go wider tires. I know the popular setup is 265/35/18 front and 285/30/18 rear but these make for smaller diameter tires. On a high revving N/A M3 that's great, the car gets into the power band quicker but on our lower redline turbo cars, that is not so good. Also, we will be adding 3-4 percent more miles to the car due to the incorrect odometer calibration.

275/35/18 and 295/35/18 would be the closest in diameter to stock diameter but I have haven't seen anyone running 295/35/18 rears. I have seen some list 295/30/18 in rear.

Then I realized that the F80 M3 runs 255/40/18 in front. this is .2" larger diameter in front and 275/40/18 rear which is .4" larger in rear.

Has anyone run thiese sizes on a stock 1M?

The BBS RIAs are 18x9.5 ET27 and 18x10.5 ET 25.

Thank you.

PS, I don't like 18x9.5 ET22 in front. I know it's popular but popular is not better often. I don't like how they look sticking out and I don't like the extra steering loading/effort that comes with this offset so I would go for the special order ET27 in front which is closer to 1M stock offset.
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