Gearing question

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nortex

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What's a goos gear for 285/70/17s. I was thinking a 4:56 but I'm not sure. I'd like no more than 2k at 70
 

kennythewelder

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Look at the tire heigth. I have the original rims on my truck with 255/70/15 these tires are about 29.06 inches tall. I have 3.42 gears and I run 2200 rpm @ 70 mph A 456 gear will make you turn a lot more rpm than 2000 @ 70 mph here is one chart, but there are more on line http://www.jekylhyderacing.com/HeightofTires.htm
 

Amp24 7

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I'm at about 2700 rpms at 70 with 285s and 4.10s......
 
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