or experimentation... just unplug the sensor, and plug a generator instead.
from what i feel... it will also depend of the tire sizes... it's no coincidence why tire replacement chart exist when you want to oversize the 'factory' tire size.
Mr e,
I was hoping to use a PicMicro as an "Pluse Generator" to simulate the speed sensor form my vehical driven at 60MPH. ie a high pluse every 500 ms = 1 Hertz right?