Re: whats my actual milage
...the tricky (not really) part is figuring out the percentage... if your tires/wheels had a smaller circumference than the stock tires/wheels, then you'd multiply the mileage by some factor less than 1 [if, for instance, the circumference was 4% smaller, then you'd multiply the odometer mileage by 0.96 in the formula given, above].
So, how do I figure out what the percentage is, you may ask.
There are a few ways to go about it.
1) measure the diameter of the tire/wheel on both the old set and the new set
. [new diameter] / [old diameter] = odometer multiplier factor
2) measure the circumference of the tire/wheel on both the old set and the new set
. [new circumference] / [old circumference] = odometer multiplier factor
. best way to measure this is to mark the tire where it meets the ground, drive forward until it meets the ground again, and measure the distance travelled.
...obviously, whichever measurement method you choose, the tires should be properly inflated, truck on flat, level ground, etc.
note: people who paid attention in math class will quickly recognize that both measurements are (or should be) identical, since the circumference is equal to the diameter x 3.14 [or any other close approximation of pi]. since we're multiplying by a constant for both operands, the ratio remains the same
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2001 Ranger XLT 4.0L SOHC
Silver Frost w/ Dark Graphite interior
Modifications
Summit 3" Body Lift
31x10.50 A/T tires
Explorer overhead console
Explorer auto-dim mirror
Explorer auto-headlights
Aux1 & Aux2 inputs on factory AM/FM/CD/Cassette
Door-dinger silencer button
Seamless retractable roof and passenger-side ejection seat with steering wheel mounted controls and safety interlock
Last edited by turbo; 03-29-2011 at 07:21 PM.
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