Duckmoore

I have a 2007 SL 550 R230 that has 18” base rims. I would like to go to 19-20” size for a more agresive look. However for the rear Width there is a choice of 10” Width to 10.5 Width. Is there much of a difference? Which one would look better? Do I need to buy new sensors?

FxFormat

Not much difference if the backspacing and offset is correct, i run 20x10.5 rear ET +30 with 305/25/20 and have no rubbing issues even when slammed.

Duckmoore

. I don’t know what ET+30 means. Thanks

Blazeracer

What ET +30 means the wheel offset is 30mm to the positive. Here's a quick read on it. MB wants like +25 or +28, something along that line for an R230. As long as you stay within a couple of millimeters you should be fine up to 10.5 on the back.

https://www.wheelprospowersports.com/offset-explained/

Frankly, I like 18's on a street driven car. You get more cushion between the road and the rim to protect from pot holes and what not.