05-23-2020, 10:49 AM | #1 |
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BMW 437m Wheels on BMW 328I X-Drive.
I recently purchased the 437M wheels for my 2014 BMW 328i XDrive .
The wheels came directly off an M4 with the OEM Specs 255/35/19 19x9 ET 29 275/35/19. 19x10. ET 40 I understand this will not work with the X-Drive system so I decided to square the set and bought 2 more 255/35/19 to match the front My question is, Am I safe with this set up? I dont want to run this risk of messing with the X-Drive, Transfer Case, etc. I've noticed my EPS seems to be heavy one second then lighter the next. Perhaps I need a 4 wheel alignment. Has anyone had this EPS issue resolved with a wheel alignment? Or potentially this could be a SAS issue Notes- Stock suspension Not lowered Any feedback would be greatly appreciated! Last edited by ryanf30; 05-23-2020 at 01:50 PM.. |
05-23-2020, 12:24 PM | #2 | |
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changing tire sizes WILL NOT change offset. the only way to change offset on a given wheel is, spacers to reduce offset or shave the hub to increase(not recommended) you're the first report i've seen of EPS affected by swap to wider front tires on a wider track. |
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05-23-2020, 01:30 PM | #3 |
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I'm running that setup on my xdrive wagon. No EPS issues that you're reporting however.
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05-23-2020, 01:34 PM | #4 | |
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05-23-2020, 01:36 PM | #5 | |
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19x9 ET 29. 255/35/19 19x10 ET 40. 255/35/19 |
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05-23-2020, 01:52 PM | #6 |
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Yup that's what I run. No noticeable changes from stock. Maybe slightly stiffer ride due to less sidewall but nothing too crazy. I think the rear is stretch a bit too much for my taste; I'll probably switch to a 235/40, 265/35 combo when I change my tires to help with that.
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05-23-2020, 02:34 PM | #7 | |
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05-23-2020, 03:46 PM | #8 |
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I'm not sure. EPS issues could be related but best to pull codes to see if there's anything first. Could be fault on the rack or something else. I haven't had any strangeness with my EPS through the various tire sizes and diameter combos I've had.
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05-24-2020, 07:55 AM | #9 |
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If I am not mistaken, there is also an option to keep the expensive and grippy rear 275/35's and replace the fronts to 245/40? I am using this setup on my not lowered x-drive and I am happy with it.
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05-24-2020, 12:36 PM | #10 |
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Ok I will plug it into Carly App and see what happens. When you upgraded wheel sizes did you notice your car having less fuel efficiency? My MPG went down when I upgraded to 19" 437M
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05-24-2020, 01:20 PM | #11 |
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I didn't notice any change but I don't really track my fuel economy closely after going stage 2 tune.
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05-25-2020, 06:48 AM | #12 |
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05-25-2020, 11:02 AM | #13 | |
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05-25-2020, 01:01 PM | #14 | |
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View post on imgur.com For a bit better idea of how they'll poke/fit on stock xdrive suspension, here's my 513ms that I happen to take some photos from when I was still on stock suspension. The tire size is a bit shorter than OEM (25.6" instead of 26") so your gaps will be a bit smaller. But the poke and overall fitment will be the same as 513m's are the same width and offset as 437m, just 1" diameter smaller. View post on imgur.com
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05-25-2020, 04:34 PM | #15 | |
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Looks great! Here is mine on the 437M set up 255/35/19 19x9. ET 29. (FRONT) 255/35/19. 19x10. ET 40. (REAR) Photo 1 - Rear Tire Stretch on the 19x10 Tire Let me know what you think! Initial Impressions: - Noticed MPG went down from going from stock 17" - Handling Performance Increase View post on imgur.com Last edited by ryanf30; 05-25-2020 at 04:40 PM.. |
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