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2004 325Ci 5MT M54B25 Stock / 2005 330Ci 6MT M54B30
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110 Posts
Discussion Starter #1
All,

I may be missing something but I am trying to decode the spec's for wheels...

I have two different e46's... a 325 and 330 and both have different wheels.

I see references to Size/Offsets etc... how do I figure this out...

I just acquired the 330 and it has larger wheels (no comments) than the 325 and I live the colder part of the country so I need to have a set of SNOW tires. The 325 has its set but the 330 needs its own and they are not compatible that much I know.

I did search the forum so I am not creating a post without doing my HW.

I know the tires are
205/50 R17 on the car but the rim size has escaped me...

Thoughts / Comments....
 

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2005 BMW 330i
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146 Posts
Basically the smallest you can run on the 330i are 17", according to an old E46 Wiki on bimmerwiki there's two 16" wheels that can fit the ASA JH3, and the 16x7.5 AT Italia Type 5. Maybe someone can chime that has tried 16s, maybe some odd spacer size can clear calipers.
But basically you have your wheel for example a style 68 (typical 330i sport package 17" wheel) which is labeled as 17 x 7.5 ET41. 17 is diameter, 7.5 is width, ET41 is offset. So an ET31 wheel would be pushed 10mm outwards, and an ET51 is 10mm inwards.
 

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2004 325Ci 5MT M54B25 Stock / 2005 330Ci 6MT M54B30
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110 Posts
Discussion Starter #4

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Any of the E46 wheels are a direct fit to your car. So, it you ever stumble upon a set of 18s, if they come from an E46 then you are golden. Buy tires and put them onto your car. ET is the distance from the centerline of the wheel to the plate that bolts to the hub. So, if you have two rims, one is an 8.5x17 and the other is a 7 x 17, and both have an ET of 47,then the entirety of the wider wheel will be towards the fender. As the wheel is wider, the ET can be reduced to balance the new width between the fender and the end of the axle. If you find an 8.5 x 17 or 18, I think the ET will be more like 41 so that the new width does not cause the tire to hit the fender.

Here's an example of an E46 wheel that you could use...

http://www.bmwstylewheels.com/bmw/67
 

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2005 BMW 330i
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Well only the fronts from a 67. Rear 67s have too much of an offset to properly fit

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