malmasri

So no issues with the extra .5 in width, ie the wheel well fits the tires without rubbing?
Also How many days do you get out of a set? do you heat cycle prior to mounting?
TIA

TRAKCAR

I got about 4 days out of the rear and 6 days out of the fronts.
I ran -2.5 camber all the way around, no rubbing with room to spare.

I never heat cycle.

stujelly

I got rubbing on my fronts but it may because i have my car adjusted down to the euro ride height

NJ-GT

The 345/35R18 R6/A6 will not fit any Porsche GT2/GT3 without major modifications.

The largest rear Hoosier that fits is the 335/30R18 (wide body GTs) and 315/30R18 (narrow bodies).

With minor modifications the 335/30R18 fits the rear of the narrow body GT3. At the front with minor modifications the 285/30R18 fits, and with no modifications, the 255/35R18 fits.

iLLM3

Is this purely for cosmetics?? LOL

Why do you need 345's on a GT3? I had 335's on my GT2, went down to 315 in hoosiers, had same amount as grip yet they were lighter, meaning, you go FASTER! Sometimes bigger isn't always better, just some food for thought!

Carrera GT

265 and 345/19 works. I'm pretty happy with the balance of the car, certainly not carrying too much stick in the rear despite the noticeable wing.

I haven't tried 18's.

There's some odd dimensions on some hooters -- the numbers are misleading, so you have to look at the specs.

http://www.hoosiertirewest.com/browse.cfm/r6/2,50.html

24Chromium

345/30-18 and 245/40-18 is what I've purchased for my 997.2 GT3. I've yet to run them on track, but I'll be certain to check the fit on the fronts to see how well the 255 might fit. Front grip is good! LOL

NJ-GT

Actually the specs are misleading as well.

I ran 265/30R19 and 345/30R19 A6 on my GT3 RS, good balance, but too heavy and tall for a tall geared car.

The 345/30R19 is as wide as the 335/30R18. The 345/35R18 is 1" wider than a 345/30R19 or a 335/30R18.

The 265/35R19 is the same width than a 235/35R19 just taller (the front should use the shortest tire possible, for good steering response). The 255/35R18 is a lot wider than the 245/35R18 or 245/40R18, it should be called 275/30R18.

stujelly

I just ran willow springs last week. Ran the 255/35/zr18 and the 335/30/zr18 and had minor tire rub in the front, but again my car has been lowered to the Euro ride height.

I am thinking the 245 in the front should fix that. I haven't has a chance to pull a wheel to verify exactly where the rub is.

Fritz Flynn

I vote for the 315 255 setup but if the 335 fits I may give it shot because I'm killing these rear tires way too fast and more rubber may help. Is both the front and rear fenders expanded on the 997.2 RS or just the front?

I say raise it a little and stick w/ the 255s up front. I was rubbing with 245s and then raised it about 1/2 inch and now I have no rubbing with the 255s.

Carrera GT

Excellent point about profile (sidewall height) ... though a little ironic from someone with an F40 in their avatar. : )

nash

Front RS fender has the little extensions (same fender), but the rear fenders are widebody panels (Turbo, C4S, GTS, etc).

You had rubbing with 245's? Or are you running a narrow body GT3?

Fritz Flynn

Yep the 245s were rubbing under heavy braking and or at the bottom of down hill to flat or back to up hill sections of VIRs full course. At the bottom after T10, under braking uphill to t14. Just the top side, not enough spring. The car is on stock susp and IMO it needs some serious susp work to really get the most out of it. However I also am impressed with how well the stock susp works especially with R6 rubber. It's not bad the way it is just not what it should be for all out track use.

I have the RS model so it would appear that I could run 335s out back if desired? I'm using some 18 x 12 CCWs with what looks like a 4mm spacer.