I just picked up a set of Rival S 315x30x18 with 11x18 wheels for the 911 and I wanted to see how they fit on my GTX. Well they fit with no leaf springs in the car. They are pretty tight makes me wish that I went with coil overs. So it looks like 285x30x18 square for me. Now maybe I car get back to building the car in about 3 weeks as we will have about 3 weeks off from racing.

I don't think they will fit in the car when the leaf springs are installed.

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Last edited by Bob J; 06/07/17 11:57 PM.
07 Porsche C2 997.1 6spd DD and SCCA Solo II SS
68 Plymouth GTX Convert. 493cu Hotkiss Wilwood Classic air, Building for Solo II Cam
65 Chrysler 300 Convert. project
57 Desoto 2dr. Firesweep 392 Hemi,Wilwood Project with son
2003 Dodge Dakota R/T "DEAD"