crb8783

Hey everyone - I just received my hollow-spoke turbo twist wheels (8 x 18 - 993.362.136.00 - ET52; 10 x 18 - 993.362.140.01 - ET65) and from all the research I've done they should fit perfectly on my 1996 993 C2 Cab, but I'm not clear what size tires I should use. The consensus on the front is seems consistent: 225/40 R18. However on the rear I'm reading recommendations of 265/30 R18, 275/30 R18, and the OEM size for the turbo is 285/30 R18. The car has a stock suspension and am looking for a size that gives me optimal performance without risking scraping the wheel wells. Thank you!

ATSR

OEM tire size for that size of rear wheel is 265/35/18. The Turbo has a 285/30/18 rear tire because the wheels are 11 inches wide since it is a wide body, instead of the 10 inches on a narrow body car like yours.

Bill Verburg

Corrsct except for the bold underline part 993t & CS & C4S all use a 10x18 rear wheel they came in ET65 which are used w/ a spacr and ET40 which don't use a spacer. These wheels protrude 25mm more than the n/b 10ET65 and can be used on those cars because of the wider rear fenders.

Stock fitment on 8 & 10 for n/b 993 is 225/40 & 265/35 x18, while 285/40 can be fitted it's usually necessary to roll at least the drivers side lip, but it does depend on other things like the specific tire and suspension setup used.

That said I would go w/ 225/40 & 265/35 as the 225 front and 285 rear induces more inder steer in an already understeering car. 245/35 & 285/30 on 8.5 & 10 is a great track setup though

TJ993

If for street driving 225/40 and 265/35
More aggressive is 235/40 front which helps offset understeer > which is what I used on my NB Twists.
One school of thought ls Michelin PS2 and currently I hear many owners have made the move to Conti extreme Sport or dws all seasons.
Depends on use.
TJ

crb8783

Thank you everyone for your posts! I'm truly grateful for the advice and how quick everyone is to respond and help.

Tlaloc75

I’m running 235 front, 275 rear and enjoying it. You get a minor reduction in gearing (equivalent of a couple % taller gear) due to the increased circumference, but you also get a little smoother ride as a result. Both minimal impacts, but maybe noticeable if you really pay attention? This size does look cool. It’s nice and meaty.

I’ve also run 225/265 and 235/265 and enjoyed each variation. I felt 235/265 gave a little too much oversteer for the street, for my taste. Rear felt loose enough to make me nervous on some corners. 225/265 is fine of course, since that’s stock size. Upping both by 10mm preserves handling balance but gives just a little more grip.

You honestly can’t go wrong with any of these variations, the differences are pretty small.

I might go to 225/265 on my next set of tires just to get a little less grip. Currently I’m feeling like I have a bit too much traction for fun street driving. It hurts my head and makes me go too fast.

SpeedyC2

^This is funny!

Are your wheels 8 X 18 ET 52 and 10 x 18 ET 65? Thank you!

Tlaloc75

I have 8.5x18 ET50 and 10x18 ET60