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Meaning of 'J' or 'JJ' in wheel size designtion?

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Old 01-22-1999, 09:28 AM   #1
Ali B
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Default Meaning of 'J' or 'JJ' in wheel size designtion?

I was wondering if someone could enlighten me on the meaning of J or JJ. To give you an example, the Audi A6 16" wheels are 16 x 7J, while those on the Chrysler 300M are 16 x 7JJ, and the wheels on the Lexus GS300 are simply 16 x 7-1/2.


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Old 01-22-1999, 07:44 PM   #2
Ray Calvo
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I think it has something to do with the wheel offset, but not positive
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Old 01-23-1999, 03:41 PM   #3
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Default It's the shape of the rim lip...

...where the tire bead seats. I was reading about it somewhere (I think in my Z3 owner's manual). I'll try to research it a bit and post or email you.


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Old 01-25-1999, 02:40 PM   #4
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Default I was wrong...

The BMW owner's manual states, "Code letter for flange type"; I'm not sure what that means. I was thinking of Asymetrical Hump, which means the tire stays on the rim much longer, after losing air pressure. Sorry!


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