raptortexas

I am having the rears replaced on my c63 (3800 miles). The dealer has a set of pirreli p-zeros that are not the mercedes spec. The MO tires aren't available unitl monday and I'd really like to get my car back. Any idea what the difference is between the two tires and if it makes a meaningful difference for non-track driving?

SebringSilver

What are the specs? Are they a different size?

raptortexas

P255/35ZR18 are the specs. Apparently the car comes equipped with a Perelli MO (Merc Only) tire that is somehow specifically designed for the c63.

SebringSilver

Oh you'll be fine with the regular over-the-counter P Zero tire. The size is correct, but honestly, you should consider going to a wider rear tire, 265 or even 275. Both widths will fit on your stock wheels.

Might even want to consider going with a different tire altogether next time (when your fronts are ready to be replaced) because there are definitely more cost-effective alternatives out there.

norb

MO or XL, which means its load rated?

raptortexas

MO just means Mercedes Only. Not sure about the load rated.

Untertürkheim

Mercedes Original (not only), close though.

RM-6302

XL means Extra Load.

bazi 007

is there any rubbing issues with the wider tires?

SebringSilver

No.

bazi 007

which brand do u use? does it last a lil longer? no problems with 4 adults? thanks in advance

SebringSilver

I'm not currently running my summer tires. We're still in the thick of winter right now so my snow tires are on. When I had my snow tires mounted though, we threw on a set of 275s for fitment purposes and there was clearly no rubbing under normal loads. I have not tried it with 4 adults in the car, but I'd be surprised that the extra 10mm of rubber either side of the oem wheels would present a rubbing issue when under slightly heavier loads.

Once my snow tires come off, I'll be happy to give you more feedback on this.

wuyichao

i will get http://www.vredestein.com/Banden_Ban...1&BandtypeID=3 for all wheels after my rear tires are shot

cheaper and better imo

ARC101

There are different load rate numbers for the same size, brand. Our Merc's are heavy and have a higher number associated with them. I can't imagaine a dealership would step outside of the requirements by much.

Phill B

I replaced the 'MO' p-zero's on my old SLK with exactly the same spec p-zero tyres, except for the fact they were not 'MO'. Had absolutely no problems with them.

mthis

i have 245/40/18 in front and have 265/40/18 in rear my rear are mickey toms, get does if you like having traction. you wont spin at all.

Strafe1

mthis,
does your setup with the MT's affect your speedometer accuracy?

mthis

not at all. i think it made it beter.

stock the car shows that u are going faster then you realy are. so you put more miles on the car now its right on point.

ARC101

you're joking right...! I for one would be pissed if I had to pay any overage fees on my lease and this were the case... I would think it would result in a major lawsuit.

Mthis, can Andy @ MHP correct via the tune...?