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Old 04-10-2016, 04:59 PM   #1
NEME515
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Advice on New Tire Sizes!

Currently drive a 2004 BMW 325i lowered on H&R sport springs. I have the following wheel/tire package installed: FRONT: 18x7.5" ET49 (215/40R18), REAR 18x8.5" ET52 (245/35R18).

I would like to upgrade to FRONT: 225/40R18, REAR: 255/35R18.

Will I be able to fit a 225 tire on a 18x7.5 wheel?
Will a 255 tire rub in the rear?

Any help is greatly appreciated. Thank you!
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Old 04-10-2016, 09:07 PM   #2
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Not sure about the front, but the rear may require a small amount of spacer to prevent rubbing on the inside. Most of out cars with 18x8.5 and 255 tires on the rear have an offset of 50 so, an offset of 52 will push the wheel more toward the shocks and fender liner.
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Old 04-10-2016, 09:15 PM   #3
NEME515
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Yeah that's what I was afraid of. The 245's I have installed now are extremely close already. I'm thinking of just keeping the rear with 245's to avoid buying spacers. Really wanna know if 225's will fit on my 18x7.5 in the front. Thanks for your insight man.
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Old 04-10-2016, 10:47 PM   #4
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On the front, most of us will be running the 225s on the front but on 8" wheels. Don't see why the tires won't fit on the 7.5" wheels but again your offsets are a little different. Stock offset on the front of mine is 47. So you would only need to check your inner clearances.

What style wheels are you using?
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Old 04-11-2016, 06:52 AM   #5
NEME515
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I bought some wheels from a buddy of mine. Hell of a deal. They're off a 2008 BMW 135i M-Sport. Wheel P/N Front: 36116779800. Wheel P/N Rear: 36116779803.

So I guess I should just look into spacers afterall for best fitment. I'm ultimately trying to match a ZHP tire setup. 225 Front/ 255 Rear.

I'm not too keen on offsets and spacers. Any idea on what size spacers I should get? From what I see online ZHP Front offset is 47mm and the Rear 51mm. Thanks for your help.
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Old 04-11-2016, 10:06 AM   #6
Max'd out
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My Ride: 04 330cic
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Model: 330cic
Transmission: auto
I have the stock setup which has offsets of 47 on the front and 50 on the rear. I used 10mm spacers and have not had problems so if you went with the 10mm, it should be fine.
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Old 04-12-2016, 07:18 AM   #7
NEME515
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Thanks for taking the time and helping me out. Gonna start researching spacers now.
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