Paul Waterloo

I am going to buy some Michelin Pilot Sport 4S for the car.....tire rack has a $100 rebate right now for four of them. I was going to pull the trigger, but then I was thinking 265 on the rears were not correct. It says the OEM tire size is 265/35/18. Then I go to discounttire.com and it shows 285/30/18 is the OEM tire size.

The 285/30/18 is right size, correct?

I know the front is 225/40/18 is the correct size. Thanks!

Alpina68

The 265/35R18 is the correct size for a 1999 C2. A 285/30R18 will fit a 10" wide wheel so you should be able to use it with no issues,
bear in mind the 285 is about a .5" shorter in height and your speedo will be off about 2 mph.

lowpue

definitely go with 285....On my car I have 295 but that is with 11" GT3 wheels

Paul Waterloo

The only problem with the 285 is that they are not available in the Pilot Sport 4S in the correct size.

I am away on business.....going to see what size I have installed on my rears tomorrow when I get home.

wthensler

Splitting Atoms

Can you go with 315 on the 11" GT3 wheels? I did a little searching and some non-porsche sites recommended 285/295 as the best fit on 11" wheels with 305 being the max.

Otto Bonn

Is the size difference acceptable for your C4? I don't know what the 225/40 diameter is but the data is out there.

De Jeeper

315 will physically fit on the rim but clearing everything takes a pretty specific offset on the rim and fender rolling on a narrow body. On a wide body its easier. I have 63mm offset holly twists on mine with a 295 tire. Most likely going to a 305. The other issue i have is the car is lowered close to 1.5" this complicates things and forces me to have 1.5-2.5* of camber to tuck everything in.

langg

I am running 235/40-18 (25.4 in. OD) on the front and 285/35-18 (25.9 in OD) on the rear. M. Pilot Sport 4S on my C4. This is less than a 2% difference between front and rear. If I remember, the Lore says less than 4% is OK.

Regards,

Lang G

e90steve

I have 315/25/19 rears, I have ZERO rub on a 19x11. I've run both et65 and et50 rear wheel, I'm also lowered 1". Both scenarios did not rub. You could easily fit 315/30/18 on an 18x11 rear, especially MKII.

Sam-Son

Bumping this one back up. Picked up some MY02 5 spokes stock tire size is 285/30/18. Anyone fit a 265/35/18 on the 5 spokes? I prefer the narrower tire as I like to feel the car move around and actually don't it to be super planted.

Any feedback?

oregondave

Yep that’s fine

Sam-Son

Ended up going with the 225 fronts and 265 rears.

Schu3507

that’s what I’m doing wt turbo twist and mich 4S. Car was designed for that size and easier

motowfo

Just doing some comparison of sizes and I'm wondering if anyone has tried 235/40R18 Front and 265/35R18 Rear on Turbo Twists.

The Revolutions per mile are within .4% and, from what I can ascertain, will actually help speedo accuracy.

I'm preparing to replace my current 225/40R18 and 265/40R18 on my car.
Thanks in Advance