u can use the tool on this website to calculate the differences in circumference when you change tyre size. Compare with the fender-tyre gap and then u can make ur choice.
http://www.miata.net/garage/tirecalc.html
Anyway I have two 195/60/15 bridgestone turanza that I want to dispose. Selling them cheap if ur interested
No worries.. as a fellow SR4 driver. I use 195/55/15 currently without problems since I'm using stiffer shocks, but if you're running stock shocks, you'll probably scrape your fender liner once in a while.. overall.. It'll still fit.
eh.. sorry.. I forgot.. stock shocks with B16 engine means lower ride height up front (heavier a bit).. if you're using the D.. no worries.. ample clearance.
I remember I tried using stock shocks.. I think only got one inch between the tire and the fender liner. (>.
Or it could be that my stock shocks are almost busted already.
postr picture of tire clearance later.. dunno where I put my bluetooth dongle... (>.<)'