amg801

Hey guys just wanted to know if anyone is running 255/40/17 tyres on the stock mono's in the rear. and if so are there any issues and do people reccommend this size over the standard 245 tyre thanks input, opinions appreciated

tasho3

I dont have 17's but i have 18's with 255's and i dont think why there would be any problems. goin to a wider tire by 10 is never in issue. i went 265 once and didnt have any issues. the C63 comes with 255's and currently i have 275 and there is no issues so i would say go for it!

MarcusF

As long as the rolling diameter is very close to the front tires, they'll work fine. I run 225/45-17 fronts with 255/40-17 rears, and have for the last 5 years or so.

DRBC43AMG

Same tyres sizes on my 2 W202's. No problems at all

503C43 ////AMG

Are you lowered?? I run a 265 in the rear no problems but I am not lowered, yet....

amg801

no im all stock height etc , ok so it souund like a few of yo run that tyre size combo. show us some pics of your 17" monos with 255's please

NitrogenBalance

I ran the stock contisports in 255/40/17 when I had my stock monoblocks. However I was lowered and did have rubbing that was bad enough to require some grinding of the rear bumper/fender lip and a litte rolling of the fender in this same area. I also noticed that with the 255/40/17 my cruise control didn't always work properly....I seem to be the only one this happened too but it wasn't anything that I could ignore either.

Pretty sure it must have to do with the 30 offset on the monoblocks as my 18x9.5's don't rub at all with a 265/35/18

popey24

The bigger the difference in rolling circumference is, the earlier your cruise control will be activated.

NitrogenBalance

It didn't work at all to be more clear.

popey24

Depends on the difference... maximum is around 1%. But I suggest not to go over 0,5%. Ask the tire manufacturer about exact circumference. There can be big differences between different tires of same dimension.
I use 225/40-18 and 265/35-18 as winter tires. I asked manufacturer before order, so I have no trouble. A friend ordered same size without asking manufacturer. It did not work on his C43.