I will check the tire out...
I am not all that concerned about the small difference in sidewall size...The size change will not effect the speedo that much... It will read 3.3% too fast... so in other words if I was doing 100 MPH the speedo would read 103 MPH.
plus that will help the car out in an autoX situation because of better turn in AND a slightly lower gearing
Check out
http://www.miata.net/garage/tirecalc.html to check out the differences.
