Gear Ratio???

[live2hunt24]

O.k folks, here we go again. This one is for a friend. 40in rear tires, 33in front tire, 6.00 rear gear. What front gear should he run and what percent overdrive would it be. Thanks

[fatal addiction]

don't go by what i say ''i hate trying to figure out gear ratio's'' but i want to post what i would put in it to see if everybody else comes up with the same thing. i would put 4.88 in it. come on guys how wrong am i eric

[W Berger]

i dont have my spreadsheet at home but i run 35's and 33's on the front with 488's and 543's and i show that to have .03.04% over spin.

[Marshall]

HMM there is alot of ways to do this but from what I was taught I came up with 4:95 Ratio Needed, You want to be as close to that number as possible!


NEXT

[SUPERDAVE557]

from what i calculate if im right in mile per hour tire speed with 6.0 and 4.88 and the tires your running there would be 2 miles faster in the front.....http://www.4lo.com/calc/gearratio.htm

[traveler]

(Front tire Dia. (roll out) X rear gear ratio) Divided by the rear tire Dia. (roll out) = front gear needed.

33" tire x 6.00 gear = 198

198 divided by 40" tire = 4.95 gear (4.88 gears would give him less then 1% overdrive) most like around 6-10% overdrive (a 4.56 gear would give around 8%)

To be more accurate, it is best to use formula using roll out of the tires on the vehicle rather then just tire diameter.

[live2hunt24]

Well 4.56 is what I thought to begin with. I guess I'm not as far off as I think I am with this stuff LOL Thanks again guys.

[fatal addiction]

(Front tire Dia. (roll out) X rear gear ratio) Divided by the rear tire Dia. (roll out) = front gear needed.

33" tire x 6.00 gear = 198

198 divided by 40" tire = 4.95 gear (4.88 gears would give him less then 1% overdrive) most like around 6-10% overdrive (a 4.56 gear would give around 8%)

To be more accurate, it is best to use formula using roll out of the tires on the vehicle rather then just tire diameter.

i always run as close to straight up as possible maybe thats why mine drives like chit eric

[fatal addiction]

ok terry so 44's rear 5.86 rear gear 34.5x9.50 swampers front what gear do i need for front? i came up with 4.56:oops: eric

[mudtoy]

I use the calculator on www.markwilliams.com It usually gets me close enough for the girls I date Gives transmission rations too.