[thenorm]

In stock class u can use any tire u want, provided that its street legal. Also u can use any size wheel that could have came stock on your car. I auto x my zx3 and I bought smaller 15" wheels to mount my Yoko Advans A-032 race tires. With the smaller wheels/tires I lost some inertial mass, and I have a 4% improvement in gearing (due to diamter change). The tires made the biggest difference in my times. Anyways, a focus will hang with the leaders in ur class, and does quite well when the times are handicapped vs. all the other classes.

Heres my car at the races, click!






PS, i would have guess an ST would be G stock, is it really H? That would be a good advantage