I maxed out the car - 120mph+
Senior Member
iTrader: (1)
Joined: 02-08-08
Posts: 3,726
Likes: 0
From: Fayetteville/Linden, NC/Myrtle Beach, SC
http://www.miata.net/garage/tirecalc.html
Now if you plug in the stock 16" wheel tire size that the program is designed for, that would be 205/55r16. Now compare that to your actual tire. If you have a 225/40r18, you will find the difference is negligable. So your speedo will still be fine.
Thread
Thread Starter
Forum
Replies
Last Post



