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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 11-29-2009, 05:21 PM   #1
ZR1Trev
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Stock 17" Tire Size Question

I have searched, but didn't find an answer to this simple question.

I recently purchased an '03 325i with the Sport Package. It has stock 17" wheels shown in the attached picture (Type 96 I think). It came with 225/45 - 17 tires front and rear. When I check tire sizes on Tire Rack's website, they show this as the correct size, with no mention of front or rear.

However, when I check the tire pressure information in the owner's manual (and tire pressure decal) it only shows pressures for 225/45 -17 tires used on the front. It shows pressures for 245/40 - 17 used on the rear.

Was my car originally equipped with 245/40 - 17 tires in the rear? If this wider tire was used on the rear, I assume that the same 8" width wheel was used for both front and rear because Realoem.com only shows a single part number for my stock wheel.
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Old 11-29-2009, 05:42 PM   #2
macnila3
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i have tha same rim, i run 225/45/17 all round, check tirerack optionscwhen it list your sizes.
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Old 11-29-2009, 06:53 PM   #3
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Those wheels don't come staggered so it the same size tire on all four corners from the factory.
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Old 11-29-2009, 09:21 PM   #4
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Yup - as stated, 225/45 all around.
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Old 11-30-2009, 06:48 PM   #5
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Quote:
Originally Posted by ZR1Trev View Post
I have searched, but didn't find an answer to this simple question.

I recently purchased an '03 325i with the Sport Package. It has stock 17" wheels shown in the attached picture (Type 96 I think). It came with 225/45 - 17 tires front and rear. When I check tire sizes on Tire Rack's website, they show this as the correct size, with no mention of front or rear.

However, when I check the tire pressure information in the owner's manual (and tire pressure decal) it only shows pressures for 225/45 -17 tires used on the front. It shows pressures for 245/40 - 17 used on the rear.

Was my car originally equipped with 245/40 - 17 tires in the rear? If this wider tire was used on the rear, I assume that the same 8" width wheel was used for both front and rear because Realoem.com only shows a single part number for my stock wheel.
Checking the owners manual, it's probably referring to the 330's sport package wheels (M68's) which are staggered 225/45 F, 245/40 R. on a 7/7.5" wheel.
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Old 11-30-2009, 07:37 PM   #6
ZR1Trev
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Originally Posted by BMW_Matt View Post
Checking the owners manual, it's probably referring to the 330's sport package wheels (M68's) which are staggered 225/45 F, 245/40 R. on a 7/7.5" wheel.
Actually, the tire pressure table in my owner's manual lists the 225/45 - 17 front and 245/40 - 17 rear in three places, as used on the 320i, 325i and 330i. It is interesting, because there are numerous tire size combinations listed for all three models, but it never shows a 225/45 -17 used on the rear.

Based on the responses, I have to assume that my car originally had 225/45 front and rear even though it isn't one of the combinations listed in the owner's manual. Thanks for the information.
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Old 11-30-2009, 08:02 PM   #7
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I think the 330 non-sport package/xi models have a 225/45 square.
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Old 12-01-2009, 06:18 AM   #8
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Whatever the original tires were, you can re-calculate the advice-pressures with spreadsheet I made and translated from Dutch to Englisch ( so Tyre instead of Tire)
http://cid-a526e0eee092e6dc.skydrive...0tyre-pressure
Always take the newest spreadsheet in this map and there is an example.
If you dont understand I can make your car an example here.
Then give here the asked data in the first apearing sheet when you open the spreadsheet, and I wil give you a full report.
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Old 12-01-2009, 12:01 PM   #9
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Quote:
Originally Posted by BMW_Matt View Post
I think the 330 non-sport package/xi models have a 225/45 square.
Correct. 330i Non-Sport runs a 225/45-17 or an optional 245/40-17 rear.

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Old 12-04-2009, 12:00 AM   #10
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Correct. 330i Non-Sport runs a 225/45-17 or an optional 245/40-17 rear.

-Charles@VMRWheels
The non-sport 330 wheel is 17 x 7, will the 225x45x17 have bulged sidewall look? Mine is the base 330i sedan and came with 205x50x17 but the Contis have a nice square look & wide thread width. Actually it is hard to find aftermarket tires in 205 size that matches the OEM Conti CV square look and wide thread footprint that is probably why we are turning to 225x45 series aftermarket tires to get the same looks.
Correct me if I am wrong.
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Old 12-04-2009, 11:50 AM   #11
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225 works fine on a 7" but may give a slight bulge to them depending on what tire manufacturer/model you are using.

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Old 12-04-2009, 08:04 PM   #12
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225 will work fine on a 17x7 but I'd stick with a 205 to avoid bulge.

Remember Canada and US often had different wheel styles and widths for the same car models.
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Old 12-05-2009, 12:12 PM   #13
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Quote:
Originally Posted by BMW_Matt View Post
Checking the owners manual, it's probably referring to the 330's sport package wheels (M68's) which are staggered 225/45 F, 245/40 R. on a 7/7.5" wheel.
You are incorrect on the wheel width, M68 is 7.5 front, 8.5 rear.
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