I have GT replica....bought a set of wheels and tires from 911 guy RA1s. He is knowledgeable so almost hate to question this. 245 X 45 and 225 X 50
He had 50s up front and 45 at rear. I have installed that way and just looks a little heavy up front ...Maybe it is just so different from 15s I was running.
Anybody running similar set up for comment. Wheels are 7.5 front and 8.5 rear........both 16s (sorry).
Thanks
Terry