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 lowlowlow 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.
