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Originally Posted by tomp
it affects power in two ways. One is the gear ratio is now taller, and the other is the sprung-rotational added weight of the larger tire. It also negatively affects brake performance as well.
Going to 35s does not hurt that much with stock gearing, but does affect it both ways above to a small degree.
Going to 37s is borderline where you might opt for 4.56:1 gears and, slotted rotors. Possibly a Programmer (a must for speedo).
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I'm running 37s - what would be the cost of having 4.56:1 gears put in. I do feel like I'm pushing the truck a little to hard off the line.
My braking is not an issue....I always leave a large cushion between the lead vehicle and myself.