Assorted CalculatorsHere are a few calculators that may be useful in deciding tire
size, gear ratios, and other stuff.
These calculators created by and
compliments of Mark
Medina @ www.4Lo.com.
Ever wonder how far off your speedometer is with your new bigger tires?
I'm using a simple ratio calculation, so this info will only approximate
your corrected speed and depends on the accuracy of tire size diameters
(assuming nothing but tire size has changed).
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 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 Tachometer
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