While in class the other day, we were talking about the capability on
many new cars to correct the speedometer for a change in tire sizes
from standard. Via the OBDII connector, in many cars you can enter
info that allows the speedometer to show the correct speed.
There are a lot of sites on the web that give you true speed from 1
tires size to another. In case you are interested, below are 2 links.
http://www.web-cars.com/math/tiresize.html
http://www.csgnetwork.com/multirpmtirecalc.html
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