[Tony Raine]

i think even my .07 is wrong to begin with.

stock tire size = 28.9
current tire size = 31

yeah, i know, going by what the tire says is not the best way. but i figure its pretty close. i have a stock sized spare, so next time i get a flat i'll measure the static load radius of both tire sizes with vehicle weight on them.

lets say the OD says i went 263 miles. truck thinks i have stock tire size.

so i assume this formula is correct:


28.9 263
------ = ------
31.0 X

***edit--> for some reason the forum is shoving my numbers over. i'll keep trying to get it to read right....

***edit2--> or just put it as 28.9 / 31.0 = 263 / X

Solve for X and you get 282.1. that should be actual miles traveled. am i way off on this?

my prior (failed) math gave me 281.4