Just wondering how many people do this conversion from 4 lugs to 5 for racing. Thanks.

Most every S30 race car I've ever seen has 4 lug wheels. What type of racing are you referring to?

I've been Time Trialing a '69 Porsche 911E with the Porsche Owners Club here in So Cal for about 4 years running 15x7 5 lug nut wheels wearing 205 Toyo RA1's. I"m about to take the POC racers clinic to begin wheel to wheel club racing. Recently, I inherited a '70 240Z from my Father-In-Law and love it! I'm thinking of putting the Z on the track, getting my POC racers license, and then expanding my horizons with other vintage track clubs racing at Willow Springs, Streets of Willow, Buttonwillow and Cal Speedway. I'd like to upgrade to 15" wheels so I can run the Toyo's (until they're no longer avail) and then maybe go to those Spec Miata Hoosiers (if they'll fit under my stock fenders). So, I'm in the market for 15x7 wheels to fit my Z for track days. And if all Z's race with 4 lug nuts, that's good enough for me. What's the favorite track day wheel? Thanks.

Just happened to read about 4 to5 stud conversion over at Hybrid Z...http://forums.hybridz.org/showthread.php?t=144533

Thanks for the tip.