The only way to compensate for the bigger tires is to change the speedo gear.
If you have a GPS it is pretty easy to calculate. You only need three things: Tooth count of gear that is currently installed, Speedometer reading, and GPS reading. Run it up to 45 or so and record speedometer reading and GPS reading. I do it at a couple different speeds.
X= speedometer reading / GPS reading
New gear = X * current tooth count
'84 CJ-7 |
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