15" tires in place of 14" on a 98

[cave man]

I am looking to put a set of 15" wheels off of a 2000 LE on to a 1998 CE. Both are 4cyl automatic. I know the tire size will change the reading on the Speed O. So is there somthing that I can change to get it to read correctly.

Thanks for any help you can give with this. I need it to read correctly because my 17 year old son will be driving it to and from school.

I posted this on another Forum but had no replys.

[chronoti]

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

after you put the old size in and the new on the bottom it will show the diff. but more or less if they are bot factory they will be about the same size

[Gibson99]

stock tire size for 15" is 205/65/15, which is nearly identical to your existing 195/70/14. that miata.net tirecalc tool is awesome. if it shows within 2% then you don't have to worry about anything - that's how much your tire shrinks as the tread wears off.