should i get 215/55 instead of the 205/55
how could 225's not throw it off more than 215's?If you use 215-55s instead of oem 205-55s, it will throw off the speedometer/odometer reading a bit. That may be one reason the previous owner used 225-50s, which provide speed/odo reading almost exactly the same as 205-55s.
You can investigate tire size differences on the tirerack site or the miata tire calculator. www.miata.net/garage/tirecalc.html
It's because the 225s are 50s, which means they have a shorter sidewall than the 215s which are 55s. 50 or 55 is the sidewall ratio. Call or email tirerack, they can explain it to you - or just visit your local tire dealer for an explanation.how could 225's not throw it off more than 215's?
i checked out the tire calculator but it seems weird how it works