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Mark Medina of 4Lo.com : منبع
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 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
Tach is. Enter the values on the left, press
Compute.
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