Gear Ratio Chart

[Disco69]

This chart is based off a 1:1 Ratio. Keep that in mind.

[jeeptj333]

nice maybe i should do some 4.10's then

[AKMark]

This is the best calculator I've ever seen for figuring out crawl ratio and comparing things.

http://eriejeeppeople.com/Jeep_tech/tire_size_gear_ratio/ratio_calculator/gears.htm

Doesn't help with the speedometer, but those calculators aren't necessarily the best for everything.