I was curious what, if any, speedometer error there is associated with going from 265 70 16 to 265 75 16. I would think it would be negligible but am curious. I searched the forums but couldn't find much on this topic. Thanks.

 

Try this link, it should tell you

http://www.miata.net/garage/tirecalc.html

 

Thanks! Very useful info.

 

It shouldn't be significant. Try measuring with a GPS.