crx mph
Senior Member
Joined: Jun 2002
Posts: 501
Likes: 0
From: Monroeville,PA
The rim size and tire size are the issue here. If they are not a match to the stock overall size you will be out of calibration. So far as I can tell there is no way to recalibrate since Honda does not offer optional speedo gears.
Senior Member
Joined: Mar 2002
Posts: 836
Likes: 0
From: illinois
you would have to have at least 205 60 17s on your car to offset your speedo that much are you sure its 10 mph off. I've had a few different combos on my car and I've never seen a 10 mph difference. What profile tires are you running.
Rotorphile.
Joined: Mar 2002
Posts: 10,120
Likes: 0
From: Richmond, VA
If you know your stock tire size, you can find a close 17" tire size on the miata.net size calculator. The closer of a match you can get, the more accurate your speedo will be:
http://www.miata.net/garage/tirecalc.html
http://www.miata.net/garage/tirecalc.html