Tire Size Calculator

[Jeff240sx]

There is a tire calculator Here (http://www.miata.net/garage/tirecalc.html)
This will clear up most problems.  Input stock tire size, and new tire size, and it will tell you how far off the spedometer will read in both a percentage and deviation at 60mph.
Have fun, and play around!
-Jeff

[SilviaDriver]

i was thinking about this cuz there is something about this up on team-integra.net about this. if you get bigger sizes how would u correct that problem?

[gh6o6]

apexi rev/speed meter will tell you corrected speed