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Technical Topics Wheels and Tires Need Advice on New Rims for M340i xDrive

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      11-17-2023, 05:07 PM   #1
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Question Need Advice on New Rims for M340i xDrive

Hello everyone,

HRE FF10 rims are currently 25% off on fitment industries, I'm thinking about upgrading the rims on my 2020 M340i xDrive and need some advice. My goal is to change the tire size from the factory squared 225/40/R19 to a staggered setup. I'm considering 245/40/R19 in the front and 275/35/R19 in the rear. I've seen various setups on other M340is, but I want to ensure a perfect fit without rubbing issues.

Here are some examples I've gathered from the website that I think might be helpful:

Example 1: 19x9 +25mm offset, with 255/35/R19 tires. I could see that the inner part of the tire is pretty close to the suspension. https://www.fitmentindustries.com/wh...orm-ff10-stock
Example 2: 19x9.5 +22mm offset, with 255/35/R19 tires, lowered by H&R springs. https://www.fitmentindustries.com/wh...wering-springs
Example 3: 20x9 front (+25mm offset), 20x10 rear (+45mm offset) with 245/35/R20 front and 275/30/R20 rear, lowered by H&R springs. No rubbing just by looking at the picture. https://www.fitmentindustries.com/wh...wering-springs
Example 4: Front: 18x9 +25mm offset, Rear: 18x10+32mm offset, with 235/45/R18 front and 275/40/R18 rear, lowered by H&R springs. No rubbing just by looking at the pictures. https://www.fitmentindustries.com/wh...wering-springs
And BMW Fanatic on Youtube is running 20x9 front (+25mm offset), 20x10 rear +40mm offset, with 245/35/R20 front and 285/30/R20 rear https://www.youtube.com/watch?v=k5QKjBoXtGI

I've done some research on the diameter and the front/back and I think my desired setup will fit perfectly just based on those successful examples from the internet. (245/40/r19 front will be 26.7 inches in diameter and 275/35/r19 rear will be 26.6 inches in diameter, the difference is within 1% so it wouldn't mess up the xdrive differentials) BMW Fanatic's setup is 26.8'' front and 26.7'' rear, so mine would be 0.1 inches shorter than his, which is safe.

However, when it comes to choosing the right wheels offset and width, I'm having a hard time with it. For the front, I'm going with 19x9 25mm, which I think would be safe because I see people run 20-inch wheels with 25mm offset, but for the rear, the rims are only available in 19x9.5 35mm, 19x9.5 45mm, and 19x10 30mm. I'd like it to be aggressive but I don't want to cause it to rub the fender, I've heard concerns about a similar setup (19x9.5 with a 35mm offset) not clearing the front struts so would 19x9.5 35mm on the rear work?

Anyone runs 245/40/r19 and 275/35/r19 without issues?

Any insights, experiences, or recommendations would be greatly appreciated!

Thank you!
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      11-17-2023, 06:26 PM   #2
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