How wide are the wheels in the back of your c55?
245: Stock
255: best "safe" size
265: will rub with people/weight in trunk, but only minimally
275+: modification needed unless you want major rubbing
personally I have run 3 sets of 255s with zero issues. However, in an attmept for better traction, im going to try 265s when this set is finished
The rim width and correct ET are the key.
You can always roll the arch and massage the bumper.
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245: Stock
255: best "safe" size
265: will rub with people/weight in trunk, but only minimally
275+: modification needed unless you want major rubbing
personally I have run 3 sets of 255s with zero issues. However, in an attmept for better traction, im going to try 265s when this set is finished

The stock stance tire edge to tire edge is 67.75" wide with 245 width tires.
I would say the widest you could go on stock rims and no rubbing would be 265, but you would have some noticable buldge over the lip of the rim.
Here are mine on the stock rim.
Last edited by ruben65; Feb 27, 2011 at 09:27 PM.





