He guys i'm wondering what would the best gear ratio to use. I'm running 38.5x14.50x20 tires and obviously my stock gearing is not going to cut it. Any info would help. Thanks

 

I have a formula for determining how to regear so that you are back close to stock.

(New Tire Size / OEM Size) X OEM Gears = New Gears

I started w/ 235/70/17 tires & 3.55. I went to 315/70/17 w/ a lift kit.

(34.4 / 30) X 3.55 = 4.0706666666666666666666666666667

I now have 4.10 gears.

5150

 

4.56 or 4.88 done deal nothing else will do the job.

 

thanks for the info guys

 

I agree, go with 4.88's

 

this formula only bases the gears on total RPM, its no basing it on tire width, weight or rolling resistance. So IMO this formula isnt worth using.

To get back to the feelin of stock acceleration you will want AT LEAST 4.56's but if it was me id go 4.88's

so 4.88's are my choice

 

4.88's it is thanks alot guys