I'm currently running my 80ZX in BSP. I've got the Tokiko HPs & Springs with a 1 1/8" ST bar on the front. I'm currently running Khumo V710 225/50-14's on my 14X6 6-spoke wheels. This is the second season on these tires and I'm looking ahead to next year when I will probably need to replace the tires. At that time I want to upgrade. At present, I have no additional plans to do any additional work on the suspension. I've spent alot of time reading through the archives and have seen info for the S30 cars with recommendations for 225/50-16's, 225/40-17's on a 17"x7.5" rim, & 245/45-17's on a 17"x8" rim. Are these valid reccommendations for the ZX? I want to stay away from rolling the fender lips, but I'm not going to discount it. For the street, I plan on running a stock wheel/tire combo for now.
Also, a recommendation from a fellow autocrosser was to consider going with a 13"tire on 7", 8", or 9" rim from Diamond Racing Wheels. I know some of the CSP Miata's run this type of set up rather successfully. Any thoughts with going with the smaller wheel set up?