So I just picked up a set of Superforgiata which is awesome. The offset however is essentially the same as the OEM 997.1 wheels which was rather conservative.

OZ offsets:
19x8.5" front ET53
19x11" rear ET51

I'm contemplating running 12mm-15mm spacers in the rear and 10mm up front.

Car isn't lowered and I have no plans to do so in the near future. I'd like an aggressive stance but no more than flush fitment.

Does this seem reasonable?

I think you will be fine but 10MM up front might be too aggressive...may want to go with 7MM becuase if I am not mistaken the front stock wheel is 19x8 and 57MM...The OZ you bought are 8.5 and 53MM so they have already pushed things out a bit???

BTW I friggin love the OZ Superforgiata wheel...if I decide to update my wheels they will be my choice!!!

PS I need to update my avatar and signature as I just bought a 2009 997TT

You're right, front might be too aggressive. I think 10-15mm might work for the rear and leave the front as is.

Yeah I think you could go 15MM on the back because the OZ rear wheel is the same offset as a stock wheel at ET51...the only difference would have been if you would have gotten the 19x12 wheel...then you may only go 10MM???

IMHO 7 mm is perfect for the front..I just installed 15 in the rear and Its fush with the fender...it's perfect from the side and the front...my only complaint is because the mpss has a slight bend on the outer structure of the tire it sticks out from the rear just a bit...I'll have to review again when my suspension system sits as it was hanging off the lift for about 1hour.... I'll be back in my garage on Friday were I can take pics...

Stock front Turbo wheels are 8.5" wide.

Details on the 09 TT.

Oops...your right...also I could not believe the stock Turbo Wheels are 11in in the rear...I would have thought 11.5in at least???

10mm up front maybe a tad too much expecially given you're on stock supsension and height. As others have suggested go 7mm up front and 15 or even 18 in the rear.

If you run spacers, we specialize in custom lengths. We will accommodate the shank length to the dimensions you need.

Look forward to seeing these installed!