TheGrrrrr
GOLD Star
I did a quick but not thorough search and didn't find anything quite like this so I figured I would post it for quick reference. Obviously I didn't capture EVERY size that folks run, but certainly most of them. I'll add more if I realize I missed an obvious one. (I already realize I haven't accounted for the LX crowd... I'll work on adding those sizes. Sorry.)
I guess there are a few ways to read this (using 275/70R18 as an example):
1. Trip Odometer on the truck says 250 miles, I actually travelled 263.29 miles
2. Distance To Empty says I have 250 miles left, which calculates to an actual DTE of 263.29 miles
3. I have travelled 250 odometer miles since last fill-up, and just filled 20 gallons for an MPG of 12.5, but my actual MPG is 13.16
The basic calculation is based on OEM revs of 641/mile, so a 275/70R18 at a circumference of 104.1 turning 641 times per odometer mile is actually traveling 1.0532 miles.
ie. 104.1*641/12/5280=1.0532
To help with calculating actual vehicle mileage, if you switched from OEM size to the 275/70R18 at 50,000 miles and now have 100,000 miles on the odometer, your truck has actually travelled 102,657.9 miles.
I tossed in the other tire specs for convenience, not for calculation. Let me know if I screwed up so I can fix it promptly. Obviously different manufacturers deviate from the sizing in the real world, so literally YMMV.
I guess there are a few ways to read this (using 275/70R18 as an example):
1. Trip Odometer on the truck says 250 miles, I actually travelled 263.29 miles
2. Distance To Empty says I have 250 miles left, which calculates to an actual DTE of 263.29 miles
3. I have travelled 250 odometer miles since last fill-up, and just filled 20 gallons for an MPG of 12.5, but my actual MPG is 13.16
The basic calculation is based on OEM revs of 641/mile, so a 275/70R18 at a circumference of 104.1 turning 641 times per odometer mile is actually traveling 1.0532 miles.
ie. 104.1*641/12/5280=1.0532
To help with calculating actual vehicle mileage, if you switched from OEM size to the 275/70R18 at 50,000 miles and now have 100,000 miles on the odometer, your truck has actually travelled 102,657.9 miles.
I tossed in the other tire specs for convenience, not for calculation. Let me know if I screwed up so I can fix it promptly. Obviously different manufacturers deviate from the sizing in the real world, so literally YMMV.
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