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Gear Ratio Calculator
Now that
you have your truck lifted, you want bigger meats. They look cool
and have the potential of being very functional, but they may
also be robbing you of power/gas mileage. This calculator will
get you back to a ratio that's closer to your original. Enter the
values on the left and press Compute.
Ever
wonder how far off your speedometer is with your new bigger
tires? This uses a simple ratio calculation, so the info will
only approximate your corrected speed and depends on the accuracy
of tire size diameters (assuming nothing but tire size has
changed).
Ever
wonder what your low-low-low gear ratio is, your "crawl
ratio"? You'll need to do a little research by finding out
the transfer case and transmission ratios first. Enter your
values on the left side, press Compute and your answer will be on
the right.
I've
spend a bunch of time trying to WAG (wild ass guess) my actual
MPH when going down the road. By knowing your gear ratios and
tire size you'll get a more accurate idea here. Enter the value
on the left, press Compute.
I
suppose if you don't have a tachometer you could use this form,
otherwise it's only useful to find out how accurate your Tach is.
Enter the values on the left, press Compute.
This
formula is a nice way to get the tire diameter of those metric
tires that are common on just about everything stock. For example
a 265/75R16 would be around 31.6 inches tall. Enter the numbers
into this form in the order you read them from the tire and press
Compute.
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