deaguero

Just wondering if anyone knows what would be the largest 18" tires both front and rear that could be mounted on the stock 18" rims? What sizes come with from the factory on the 18"AMG wheels? Thanks in advance for any help here!

Familycar

This is an important question from a performance standpoint I think. Tires I think are the weakest link on this car. The M3 is both lighter and has fatter tires - THIS IMO is the main cause of the delta on the track.

In a PZero OEM rims should fit (according to tirerack specs):

http://www.tirerack.com/tires/Spec.j...irePageLocQty=

Fr: 245/35/18
Rr: 265/40/18

If you go + by 1/2" which I've done before w/ another rim and another tire you might be able to go

Fr: 255/35/18 (rec rim range: 8.5 - 10)
Rr: 285/35/18 (rec rim range: 9.5 - 11)

diameter on the 255 is close to OEM. diameter on the 285 is 0.8" larger. As a point of reference, here's what's on the F1 medical which is a C63 estate. "19-inch AMG light-alloy wheels of 8.5-inch (front) and 9.5-inch (rear) width are fitted with Pirelli tyres of sizes 255/35 and 285/30, respectively."

Interesting read. May have been referenced already, apologies in advance. Link:

http://www.zercustoms.com/news/Merce...dical-Car.html

BoBcanada

I'm switching to 245/265r as soon as posible... would be nice to go 275 at the back prolly.

deaguero

Very helpful post, Thanks again! What brand were on the C63 when you took delivery?

Spd Kilz

My plan = Wear the stock tires down then get the widest wheels and tire combs possible!

Glock Guru

+1

Familycar

"My plan = Wear the stock tires down then get the widest wheels and tire combs possible!"

Do it! ! I'm hoping that'll all get sorted by the time I'm ready for rims.

Phil, I don't have the car yet. July 1 build date. I looked up the PZeros b/c that's what's on the 08 test cars given to the magazines.

digo63

ADVAN AD08 285/30R18 93W would this be to wide for the C63 oem 18' rims ?

please clear my confusion.thanks guys

nrgy

Yes, the maximum I would go is 275 in the rear. I went up to a 265/30 on my 19" rims, and they fit perfect. I would like to try a 275, but I think even that might be pushing it a little depending on the particular tire make/model.

maximooz

Yeah I'm also looking to switch to a wider tire once the OEM Pirellis wear out.

I'm slightly confused about the specs on the F1 C63: 255/35 and 285/30 on 19" wheels -- why a 30 series tire in the back? Is there any benefit to running different diameter setups, front vs. rear?

sjhugh

The profile height (30 series) is a percentage of the tyre width. If the rears are wider they will need a lower profile than the fronts to maintain a similar overall diameter.

C63newdude

On a different note I think 275 in the back is absolutely the max I would go. Many people are running 265's