Land of chad
Newbie
I have 32 inch tires with 15 inch wheels and i was curious as to what gear ration in the rear end i should be running to compensate for the power loss that comes with these sized tires
What should i use?
- Thread starter Land of chad
- Start date
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There are gear ratio calculators online, and if you're brighter person than me, you could just do the math. There is the sticker on the drivers door, which shows factory tire sizes, though you may need to also convert that to an actual inch number, with a tire calculator.
Use the info you gather between stock dimension, and what you have now to determine what ratio you need.
I came up with 5:38 when I did mine on 40's, and crazily enough my speedometer is right on after the swap. Better than my daily driver.
Someone else running the combo might be able to spit out a number they are using, and it be good, but I just thought I would share how I came up with the info to do mine.
Use the info you gather between stock dimension, and what you have now to determine what ratio you need.
I came up with 5:38 when I did mine on 40's, and crazily enough my speedometer is right on after the swap. Better than my daily driver.
Someone else running the combo might be able to spit out a number they are using, and it be good, but I just thought I would share how I came up with the info to do mine.
b454rat
I'm Awesome
Not enough of a difference to notice. If your truck came with 245/75s, they are a 31" tire, so going up a 1/2" isn't noticeable.
Cadillacmak
I'm Awesome
It really depends on where you want that power, low end or top end. I run 410 gears with 32ish tires and like where my power range is.
Dunno what they came with stock, but my calculator shows 29.5" for a 245/75r15. My dually had 225/75r16's at 29.5" also. 4:10 factory.
I suppose the OP didnt ask for a factory match, just have to get the code from the glovebox, or take it apart and count to see the ratio in there now, and you only have so many options to go lower.
I suppose the OP didnt ask for a factory match, just have to get the code from the glovebox, or take it apart and count to see the ratio in there now, and you only have so many options to go lower.
I am running 33x12.5/15 tires and I regeared it to 4.1:1 and now it sits on 60 mph at 1800 rpms when the TCC locks in OD.
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