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 (assumimg nothing but tire size has
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
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.
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