Tires/ Wheels Dilemma

[ecride]

Hi, I recently took delivery of a 997.2 TT Cab and have been very happy with it. I would, however, like to change the wheels to the new BBS Fi. The problem is that they come in some very "odd" sizes/ offsets:

For the Front wheels:

8.75x19 ET50. The Stock wheels are 8.5x19 ET56. Will the 6mm less in offset cause any problem? For the Rear Wheels:

12x19 ET50. I would like to keep the stock rear tires which are 305/30 R19. While the ideal wheel width for 305/30 tires are 10.5" to 11.5", I know that stock GT3s have 305/30 tires on 12x19 rear wheels... Will I be able to keep my stock tires on a 12x19 wheel or will they be "too stretched"? My other alternative is to get the 11.25x19 ET55 version of the BBS Fi. While these are supposedly "designed" for narrow body 997, I suppose I can "convert" them for a wide body 997 by simply adding a 5mm spacer?

I tried calling the local dealer of BBS here but they have not been very helpful at all. I have also sent these questions to the "product inquiry" section on the BBS website, but have not received a reply.

Many thanks in advance for your help.

[PAULSPEED]

On my 2006 997 S I have 8.5" in the front and 11.5" in the rear.

The rear tires are 305 x 30 x 19.

I do not think a 1/4" will make much difference.

I once put a 315 tire on the rear so I could drive home.

Paul