Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Exotexs
Jedi Knight
Offline
check this Tire Size / Speedometer Error Calculator:
if you change the size of your tires from the stock/factory size, your speedometer will not be accurate.
find out how much the speedo will be off, by entering the stock/factory size of your car's tires and then enter the size of the new tires you want to install. Then click on CALCULATE.
This is great for those who plan to pimp their cars with 22" wheels!
https://www.miata.net/garage/tirecalc.html
Ex
if you change the size of your tires from the stock/factory size, your speedometer will not be accurate.
find out how much the speedo will be off, by entering the stock/factory size of your car's tires and then enter the size of the new tires you want to install. Then click on CALCULATE.
This is great for those who plan to pimp their cars with 22" wheels!
https://www.miata.net/garage/tirecalc.html
Ex