Quote Originally Posted by Zdster View Post
There is no need to have your speedo recalibrated just because you increase wheel size. Just use a tyre size calculator to determine the change in your speedo (http://www.miata.net/garage/tirecalc.html)
if this was directed at me...
thats because i need to present the speedo calibration test report to the engineer, so a engineers cert can be issued.