slize

Hi guys, I am in need of new tires for my c55 an had some questions. I am currently running 225/35/18 and 255/35/18. I want to know if I can put 235/40/18 in the front. And if so, would I have to change the rears to larger to balance it? If anyone has done this let me know. Thanks

Benzaddict32

It shouldn't be a problem. I wouldn't go any wider in the rear if you're on stock wheels.

PJmak

I run 40 series in front and 35 in the rear on my c43 forever. I think the c55 I just got is same

Accidental L8 apex

That's a good setup as I have the same. 265 rears want to rub on compression or I'd still be running those. IMO, 245s up front made the steering slow and numb so I dropped a size. 235s seems to be a good compromise.

Viper98912

Careful you don't rub the front spring perch above the tire.

gofisch

I have 265's on the rear and have never rubbed. Do have a different shock set up?

Accidental L8 apex

Depends on the brand and tire. Pilot Super Sports rub just barely at full compression, Conti DWs rub almost all of the time but Hankooks never rubbed. All 265s, but since I'm stuck on PSSs because they're phenomenal, I dropped down to a 255.

badbenzz

I put the newest Michelin super sports on the rear 255/30/19 and they rubbed like crazy. Replaced all 4 tires with the newest Conti Extreme Sport rubbing all gone. The SS tread measured 10" versus the Conti's at 9.1" which is a huge difference.

Justin9212

I have 235/40-18 up front and 265/35-18 out back. Fits great, no rub. Running PS91's and couldn't be happier with them.

rx7effini

I'm on 245/40R18 Front
265/35R18 Rear
Both Pirelli P Zero

I really don't know will have issues in the long run 😜

Ackime Snow

Hey did you have the car lowered when you were running the 255s?

Thanks

Leftlane

I've done it - currently sporting 235/40R18 and 255/35R18 Michelin Pilot Super Sports on stock wheels and stock suspension with stock exhaust (okay, exhaust doesn't matter but I like speaking in threes ). I wanted a simple +10mm all around last year when I put these on.

No rubbing, scraping, or odd noises of any kind. I track my '06 C55, as well.**

Next I'm going to put some effort into getting a square stance with rear wheels up front. I understand that's a bit more effort (spacers, lugs/bolts, etc.).

**EDIT: just recalled when I track I can make out rub marks on my lower control arms; so the "of any kind" comment is actually limited to street driving. Regarding track driving, it ought to read "of marginal kind". But I'm pretty ham-fisted in the corners

badbenzz

No the car has not been lowered (yet) and remember I am running 19" not 18"