Changed tire size, how much is speedo off??

[Guardiannknight]

My car came with stock 215/60 tires. I replaced them with 245/50 tires. Is there a formula or can someone tell me how much my speedo is off and in which direction its off. [img]smile.gif[/img]

[Silver2000V6]

Try this site:

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

According to it your speedo is 2% too fast.
60mph on the speedo = 58.8mph.

[Guardiannknight]

Cool, thanks for the help and the link. [img]graemlins/thumbsup.gif[/img] [img]graemlins/thumbsup.gif[/img]

[6Banger]

This site has all different calculators, including tire size/speedo. You can see the difference at all different speeds.http://www.fbody.com/calc.htm

[ April 11, 2002: Message edited by: 6Banger ]</p>

[Guardiannknight]

Another cool link, Thanks. [img]graemlins/thumbsup.gif[/img] [img]graemlins/thumbsup.gif[/img]