What gear ratio should I install in my Jeep Wrangler TJ / LJ? (and other re-gearing FAQs)

Hasselblad said:

I've seen posts where dana spicer gear sets have been recommended but I am having a heck of a time googling sets for 2006 rubicons. Do these exist?
Trying to find a high end alternative to the unobtanium revolution 5.13 sets.

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machoheadgames said:

Most all of the 31’s I’ve driven end up right at 29.5” actual, so assuming he’s in that range, the 41 would get him an accurate speedo. 43 is how the factory would have equipped it, following their logic. Which is to have the correct odometer and a speed buffer. The charts muddy the waters because you never know what actual size tire was used and you don’t know if they prioritized speed or distance. Most tend to care only about speed, but I kinda like the factory logic so I usually offer both suggestions.

But yeah, in this case doing the math would be an easy way to determine the correct percentage to adjust by for accurate speed.

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