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Old May 15, 2003 | 08:56 AM
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Offset?

Ok I'm a newbie when it comes to wheels and tires. I read a bit about wheel offsets and understand the basic concept. However, I need to know, what is the proper offset for a C class sedan and how is it adjusted when new wheels are added? Spacers?
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Old May 15, 2003 | 09:28 AM
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depends on the weather
wheels are typically manufactured with the offset built into the design of the wheel .... Spacers are widely considered to be a bad idea unless they are hubcentric and designed for a specific application
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Old May 15, 2003 | 11:33 AM
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Re: Offset?

Originally posted by oggle
...However, I need to know, what is the proper offset for a C class sedan and how is it adjusted when new wheels are added? Spacers?
There is no single proper offset. For any given wheel width, there are a few offsets that usually work. This assumes a reasonable wheel width, say 7.5" - 9.5". Even with a proper offset, getting a tire that is too wide you may still have rubbing.

Using my stock C7 wheels, my 18" Evo5 wheels and some spacers, I did a little playing along with some math, this is what I think is the best fitting wheel tire combo:

Front: 18x8 et 32 225/40
Rear: 18x9 et 32 255/35

This combo looks good with a wider tire like the Bridgestone S-03. I don't suggest a narrow tire like the Kumho 712.
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Old May 15, 2003 | 01:59 PM
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Re: Re: Offset?

Originally posted by KWiK Front: 18x8 et 32 225/40
Rear: 18x9 et 32 255/35
Can you explain the parts I've put in bold? I don't eve know how to read these things lol.
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Old May 15, 2003 | 05:58 PM
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Re: Re: Re: Offset?

Originally posted by oggle
Can you explain the parts I've put in bold? I don't eve know how to read these things lol.
the 32 in your bold is the wheel OFFSET

the 35 you have in bold is the tire Aspect Ratio

Those links and many other helpful wheel & tire pages are available at the TireRack TechCenter
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Old May 16, 2003 | 01:24 AM
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Thansk KWik. I am learning a bit more, although it's still a blur to me as I've nothing to compare those numbers to. I'll get it some day.
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Old May 16, 2003 | 02:00 AM
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Originally posted by oggle
Thansk KWik. I am learning a bit more, although it's still a blur to me as I've nothing to compare those numbers to. I'll get it some day.
Pull off one of your stock wheel and read the size & offset to help picture what a different offset would do
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Old May 16, 2003 | 09:39 AM
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depends on the weather
read the tech posts in this forum and you will understand better
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