964 Narrow body Tire Question

[964TargaC2]

Got a set of 7x17 and 9x17 Speedlines, 55 offset

Previous owner thinks they were shod with 225/45/17 front and 255/40/17 rear

I am running the usual 205 front and 255 rears on 17 inch turbo twist/55 offset

Am lowered to RS height and no body modifications

Any issues /ups or downs going to the 225 255 combo?

Thanks for any advice

[Bill Verburg]

stock for the 7 & 9 x17 was 205/45 and 255/40

225/45 fronts will also work and reduce under steer a bit, I use them on 8s but 7 also work ok

[964TargaC2]

Thank you...I had a feeling you would be answering this :-)

[trak ratt]

7" and 9"x17" Cup Wheels with 235/255 on our '91 C2 w/RS springs/shocks and close to RS ride height.