Anybody running 255/40/17 on the back factory rims?
#1
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'08 C300 4Matic Sport, '02 530i
Anybody running 255/40/17 on the back factory rims?
Currently got the factory staggered setup (225/45/17 front and 245/40/17 rear). When it's time to get new tires, I was thinking of using 255/40/17 on the rear - it is actually a closer match in overall diameter to the front. Anybody running this size? Any issues?
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If you dont mind the speedo being off a bit, then that works
Last edited by mr inkredibul; 11-01-2010 at 02:25 PM.
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'08 C300 4Matic Sport, '02 530i
The reason I referenced front diameter is that I thought that when it comes to AWD, the wheel diameters (front and back) should be kept identical. Otherwise it puts additional strain on the differential, but I'm not really all that well versed on how modern day 4Matic works in that respect.
. Your tires will be too small in the back.
#7
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I'm not worried about the speedo - the difference between 245/40 (OEM) and 255/40 is very small.
The reason I referenced front diameter is that I thought that when it comes to AWD, the wheel diameters (front and back) should be kept identical. Otherwise it puts additional strain on the differential, but I'm not really all that well versed on how modern day 4Matic works in that respect.
Too small? Just the opposite. The factory size is 245/40 and I plan on using 255/40.
The reason I referenced front diameter is that I thought that when it comes to AWD, the wheel diameters (front and back) should be kept identical. Otherwise it puts additional strain on the differential, but I'm not really all that well versed on how modern day 4Matic works in that respect.
Too small? Just the opposite. The factory size is 245/40 and I plan on using 255/40.
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#8
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2/5th's of an inch
won't be any issue but I doubt it will prevent curb issues. They need to be taken up with the operator![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
Or look for those new types of tires with the rim protector feature.
![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
Or look for those new types of tires with the rim protector feature.
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