mambodoc

Can I get anything larger than the 255/40's on the rear without mods or worries?...I want to maintain the original rims and would like to get as much rubber as possible on the road. Thanks!

wds928

I installed 275/40x17 Michelin PS2 just a couple of months ago. They fit just fine on factory rims. The fronts are 245/40x17.

No pictures yet with the new Koni/Eibach combination, but it does sit a bit lower, but no rubbing.

bgrabner

Bill - that looks awesome! Can't wait to see it in person on Saturday

wds928

Bill, it sits about 1 inch lower with the new shocks and springs. I sure hope this heat clears out for Saturday. I loaded up big plastic Rubbermaid container with tools and stuff. I'll need to bring about 4 shirts if the humidity keeps up. Did Chris say his garage was air conditioned???

Alan

I also run Michelin Pilot PS2's 275/40 17's on the back and 225/45 17's (stock) on the front. Works well with no other mods - on the stock wheels. Absolutely no interference. Slightly changes the relative speed wrt to the speedo (speedo reads slower) but only a few % - some have claimed it only takes out the conservative tolerance Porsche puts in...

Haven't calibrated so I don't know.

I like the tires, very good grip (better than my 255/40 Bridgestone Potenza S03's) and quite the quietest tires I have run on the GTS.

Alan

bigs

I have 275/40 R17's on the rear and 225/45 R17's on the front of my '93 GTS.

dr bob

Theory is that a 275 will stick out about 3/8" (10mm) more on each side than the 255 originals. I noticed that the PS-2's have a pretty beefy sidewall protection bead on them. The bead alone sticks out more than the 10mm on the PS-2, compared with the Pilot MXX3's they replaced.

The PS-2's are very quiet, very sticky by the way.

mambodoc

Thanks a million to everyone, the 245/275 combination looks good. The local discount tire chain store cannot find the 275's so I'll go elsewhere.

Alan

Try Tirerack!

Alan

dr bob

The local Costco store managed to price the PS-2's well enough to make Tire Rack my second choice. They use a no-contact installer/mounting machine. They also let me 'help' with some of the balancing calcs needed to get the weights inside the spokes.

I take my wheels to them clean and off the car so it goes a lot faster than standing in line.

They needed four days to get the tires shipped in, normally this is two days but a holiday snuck into the middle of my schedule.

Costco has road hazard and lifetime balancing warranties included, something quite rare with performance tires.