Post C Class with aftermarket rims
First number is tread width in MM
Second number is the ratio of sidewall height to tread width. (30% of 255mm for example is a sidewall height of 76mm)
Last number is wheel diameter. On a staggered set up with wider rears you drop down in sidewall ratio on the rear to keep the overall wheel + tire diameter the same or close to it.












The Best of Mercedes & AMG
More proof the C450 is a unique beast, top to bottom, for better or worse.

http://simptiongst.com/about.php
http://simptiongst.com/index.php
And btw, i had those extensas on my last car (genesis coupe) in the rear, 275/30/20 and these were pretty slippery in the rain, even in the slightest rain so I just wanted to tell you to be careful. I totaled my genesis coupe on the highway by hitting the wall because I had to yank the steering wheel just a little so I can avoid this stupid car coming into my lane (they didn't check their blind spot) and the rear end kicked out to the point that I couldn't save the car. I must have counter steered in the middle of 5 lane highway like 6 times(luckily I dodged all the cars but couldn't avoid the wall) but still couldn't bring it back.





deleted my c205 pics ((((20" (8.5J ET 45 and 9.5J ET 50) and lowered on H&R)))) pics because this is the W205 section.. sorry....