Does anyone know whether or not wheels/tires for the GT3 and RS are interchangeable? I know the RS has more aggressive wheel offsets (but same width as GT3) and wider tires (245 & 325 for RS versus 235 & 305 for GT3). Thanks in advance.

 

The fronts are 9 inches wide on the RS vs. 8.5 on the GT3. Regardless, you'll have the tires hanging out past the fenders both fore and aft due to the offset/width front and offset rear.

 

The wheels are not interchangeable. The widths and offsets are very different.

 

I see -- thanks for clarifying!

 

The widths are the same on the rear.
The fronts are 8.5in on a GT3 and 9in on an RS.
Front offsets are 53 on a GT3, 47 on an RS. That should result in the front RS wheel sticking out about 12mm on a GT3, and inward about 0.5mm more.
Rear offsets are 63 on a GT3, 48 on an RS. The rear RS wheel should stick out about 15mm on a GT3.
Front fenders are the same on both - Porsche chose to stick on the plastic wideners. Rears are of course a wide body.
Has anyone actually tried fitting RS wheels on a GT3, and putting appropriate (track-oriented) camber, i.e. -3 front, -2 rear?
I plan to try it out sometime this year.
Best regards, w