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      07-06-2009, 08:30 PM   #1
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Acceptable wheel offset?

I am considering an upgrade on my mercedes (I also own a BMW, but their forums suck!) wheels/tires----going from 17" to 18". The front wheels currently are 7.5" with ET 45 and the rear wheels are 8.5" with ET 49. The set of wheels I am considering are 8.5", ET 38 (front) and 9", ET 39 on the rear. I put these numbers in an offset calculator and here are the changes:

front: inner clearance=6mm less, outer position=extend 20mm
rear: inner clearance=4mm more, outer position=extend 16mm

Are these changes in offset and wheel position substantial enough to cause any undue wear on the car or worsen ride quality?
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      07-06-2009, 08:34 PM   #2
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lol this is a bmw forum..
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      07-06-2009, 09:17 PM   #3
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      07-06-2009, 09:23 PM   #4
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      07-06-2009, 09:25 PM   #5
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I'd look at the wheel specifications on tirerack.com and see what offsets they find acceptable for your make and model.
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      07-06-2009, 10:28 PM   #6
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I have no clue what these are going on, but extending 20mm out is quite a bit for any vehicle.

-Andy
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      07-07-2009, 06:46 PM   #7
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I think you will be fine. 20mm isn't that much. The best thing to do is find other exact models of your car, you know on a Mercedes site, that have similar offsets to what you want to use to see if they will rub.
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      07-07-2009, 08:52 PM   #8
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Quote:
Originally Posted by King Tut View Post
I think you will be fine. 20mm isn't that much. The best thing to do is find other exact models of your car, you know on a Mercedes site, that have similar offsets to what you want to use to see if they will rub.
20mm is not much based on what? It all depends on what car it is going on. If it was flush to begin with, 20mm is A LOT.

-Andy
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      07-07-2009, 10:59 PM   #9
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what is this crap?
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      07-08-2009, 05:31 PM   #10
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Offset/width of a wheel will not affect ride quality or wear on the car. It will only affect whether you will rub on the fenders/suspension of the car.

Let us know what type of Mercedes you have and we can help you out some more.

We are a sponsor of mymbonline.com and should be able to help you out with your wheel selection. Shoot me a PM if you would like.
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