OK now I know there is the little bar on the bottom of the calculator that tells you your RPM @ 65mph depending on what gear ratio you are running. But what about being able to manually select which gear ratio you want to run to see dif in MPH in the list thats already provided? say stock vs 315/70R17 and 4.56 gears or vs 315/70R17 and 4.88 gears? I think this would help people choose a proper gear ratio. Now is this even a calculator the greats minds of TW came up with or simply borrowed from another source?
If this has been brought up before then carry on!