Its the aspect ratio. The 315x25 aren't as tall as the 305x30. I'm running 315x25, lowered (but above GT2 ride height), with rolled fender lips.....no rubbing.

 

thats what im running 315/25s but with 14 mm spacers due to my intakes beeing in the fenderwell and its awful close ...

 

I had 21mm RUF spacers on my 996TT and they were just right.

 

depending on the offset and the widt of the wheel .

 

Nice plate Scott!!

-Torey

 

Scott I have went through 4 sets of 335 Toyo R888 rears, my car is slammed but has almost -3 camber for the track, but no rubbing or issues, and all of these tires were burnt out on the track so corner loads/weight transition and so on, still no rubbing!

 

I have a barely used set of Toyo's 315/25/19's with approx 800 miles on them. I got the Conti Sport 2's on sale and wanted to run the same tire on all 4's. Toyo's are available for $375 for the pair plus shipping or pick them up. send me your email address for photos. I am in the San Francisco bay area.

 

How much clearance (from turbos) is that giving you?

 

A note to all re TYRE SIZES--- you need to measure across the tyre face to get a proper comparison-- the numbers on the tyre & those quoted by different manufacturers are not an accurate comparison. Some 295 are a wide if not wider than others 305-- they seem to be measured differently .Getting hung up on having a 315 and rejecting another at 305 from a different manufacturer may not be helping yourself.

** I just reread the thread and there are already comments there that mention this-- really important to actually measure the face before getting too marginal.

 

Scott GT2's have fenders rolled from the factory, you can feel the difference when you put you hand on them. You may need to play with spacers and making your intake tubes more "oval".
I think with some messing around, you can make it work.
If you run spacers make sure you get the longer wheel studs.
H&R makes spacers (wheel enhancement has them), and studs.

MK