XCal2 Retuning Help

[Cris Laroco]

Hey folks. I'm trying to get my XCal retuned so that my speedometer reads correctly. I have 285/75/16 Pro Comp all-terrains and need to figure out what the tire rotations per mile is. I've used some of the calculators online, but I'm not sure if they factor in the fact that they're all terrains. Does anyone know if the numbers I'm getting from these calculators okay or is there a formula that I should use to get this info?



Any help is appreciated.

 

[Dallas Starr]

it should be on the pro comp website...

 

[Dingo]

285mm*0.75=213.75mm

213.75mm*2=427.5mm

16"=406.4mm

427.5mm+406.4mm=833.9mm

833.9mm*3.141592654=2619.774mm.

2619.774mm=103.141"

5280'*12=63360"

63360"/103.141"=614.305 revolutions per mile.

 

[Cris Laroco]

Wow...I would've just accepted "About 614 revolutions per mile," but I'll take the full equation as well. Thanks Dingo.

 

[Todd Z]

Dingo just needs to show off once in a while... It is ok... it stops him from going postal !!! :lol::lol:



Todd Z

 

[Dingo]

heh... I sometimes accidentally revert to my engineering background.

 

[Doctor CAD]

You shouldn't have to have it reprogrammed for that feature.



It should allow number of revs/mile changes on the software that came with the Xcal