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E36/7 Z3 (1996-2002)
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  #1  
Old 09-16-2002, 02:16 PM
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bob lindquist bob lindquist is offline
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Correct wheel offset

I am looking to replace the stock M Coupe (2000) wheels and want to get the offset correct. What is stock offset? and should I change it when replacing the wheels?
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  #2  
Old 09-17-2002, 09:30 AM
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Ron Stygar Ron Stygar is offline
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Stock offset is:

Front 7 1/2Jx17 ET: 41 mm
Rear 9Jx17 ET: 8 mm
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Old 08-16-2004, 12:06 PM
samer555 samer555 is offline
 
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Given the few wheels that fit the MZ3's because of the unusual offset, is there a formula to figure out if a certain wheel will fit an M Coupe/Roadster. For example, if we take Ron's info about the front wheel being 7.5 inches wide with a 41mm offset, do the mathematics look anything like this:
7.5" x 25.3mm = 190mm in terms of width. Then you divide that number by 2 to get to the center of the wheel width, which is 95mm, and then add (or is it subtract?) the offset number of 41mm, which will be 136mm or 54mm (depending on how messed up my calculations are ). Can this final number be used as a comparison of width/offset ratio on all wheels to figure out if it would fit an MZ3. Appologies in advance if I'm way off.

Last edited by samer555; 08-16-2004 at 12:08 PM.
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Old 08-16-2004, 01:08 PM
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What I always do is to make 2 sketches side-by-side with all that info, one for the stock and one for the potential wheel. Then determine the proper tire size for each (if different), then look at the differences between the two and see if the additional clearance required on the inside and/or outside is available on the car.

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Old 08-17-2004, 07:52 AM
GV from Belgium GV from Belgium is offline
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OR.... you can use this offset calculator...

http://toy4two.home.mindspring.com/offset.html



greeeetz from Belgium
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  #6  
Old 08-17-2004, 10:46 AM
samer555 samer555 is offline
 
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Mein Auto:
Thanks, that is exactly what I was looking for. Anyone know the tolrances for reduced wheel well clearance and increased offset for clearance of the wheel arch for the M Coupe/Roadster?
Thanks
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