Need help with tire size ..........

coupegt · 01-14-2015, 08:38 PM

Will a 225/45-18 fit a 08 328xi ? In the tirerack site, it states a 225/40-18, the 225/45 -18 is coming off a 2010 328 coupe. thx

b-man · 01-15-2015, 07:23 AM

It should fit with stock suspension. They're a little taller than stock tires. If you're lowered, you may rub. It also depends on the wheels

Tom Droze · 01-15-2015, 07:38 AM

Quote:

Originally Posted by coupegt

Will a 225/45-18 fit a 08 328xi ? In the tirerack site, it states a 225/40-18, the 225/45 -18 is coming off a 2010 328 coupe. thx

I have a 2012 328i coupe and I have the 18 inch 397 wheels, which has the 225/45/18 tires. These tires are 1 full inch taller than the stock 17 inch set up. I also have the Eibach pro kit and I have no rubbing issues. The taller tire will change your gearing by about 3 percent. Very soon I will be ditching the run flat tires and when I do I am going to replace them with 22/40/18 tires. I am going to the recommended tire size only because I do not want the additional tire height from a gearing standpoint.

coupegt · 01-15-2015, 08:49 AM

Quote:

Originally Posted by Tom Droze

I have a 2012 328i coupe and I have the 18 inch 397 wheels, which has the 225/45/18 tires. These tires are 1 full inch taller than the stock 17 inch set up. I also have the Eibach pro kit and I have no rubbing issues. The taller tire will change your gearing by about 3 percent. Very soon I will be ditching the run flat tires and when I do I am going to replace them with 22/40/18 tires. I am going to the recommended tire size only because I do not want the additional tire height from a gearing standpoint.

I'm not a mechanic by any means, but I would think the taller tires will have some impact on the X-drive ????? Can anyone comment on this

shadow191 · 01-15-2015, 08:56 AM

As long as all 4 tires are taller, it won't impact the X-Drive. As the other poster said, taller tires impact the speedometer. But the AWD system will only be impacted by front and rear tires that are sized differently, that's very bad for the transfer case.

Tom Droze · 01-15-2015, 04:57 PM

In my case the taller tires helped with speedometer accuracy. Prior, an indicated 70 MPH was about 66 MPH. With the taller tires an indicated 70 MPH is now about 68 MPH.

01-14-2015, 08:38 PM	#1
coupegt Enlisted Member 10 Rep 43 Posts Drives: e90 328xi Join Date: Jan 2015 Location: NJ iTrader: (0)	Need help with tire size .......... Will a 225/45-18 fit a 08 328xi ? In the tirerack site, it states a 225/40-18, the 225/45 -18 is coming off a 2010 328 coupe. thx
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01-15-2015, 07:23 AM	#2
b-man Major 604 Rep 1,090 Posts Drives: 328xi Join Date: Jan 2013 Location: maine iTrader: (2)	It should fit with stock suspension. They're a little taller than stock tires. If you're lowered, you may rub. It also depends on the wheels
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01-15-2015, 08:56 AM	#5
shadow191 Lieutenant Colonel 181 Rep 1,681 Posts Drives: 2017 Volvo XC90 R-Design Join Date: Dec 2012 Location: GA iTrader: (3)	As long as all 4 tires are taller, it won't impact the X-Drive. As the other poster said, taller tires impact the speedometer. But the AWD system will only be impacted by front and rear tires that are sized differently, that's very bad for the transfer case.
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01-15-2015, 04:57 PM	#6
Tom Droze Major 413 Rep 1,286 Posts Drives: 2012 BMW 328i (e92) Join Date: Jul 2014 Location: Scottsdale, Arizona iTrader: (0)	In my case the taller tires helped with speedometer accuracy. Prior, an indicated 70 MPH was about 66 MPH. With the taller tires an indicated 70 MPH is now about 68 MPH.
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