The following form can be used to find your PSOM conversion constant
by feeding it your true, unloaded tire diameter. A 35" BFG MT KM is only
34.8" tall, and most other tires are shorter than the listed diameters as well.
I make no accuracy guarantees but these seem to be very close to the
few published FORD values that I've seen. Visit National Tire and go to
"SPECS" to find your tire's actual diameter. This only works for 92-96 Broncos
and F150 trucks, though to extend it to 92-97 F250/350 trucks with the Sterling 10.25"
rear axle just multiply your constant by the fraction (120/108). Keep in mind that these
values are for a new tire with full tread, and that if you start with full tread Boggers and
run them down to the belts, you're talking about losing several inches of diameter!
Click here for PSOM programming procedure.
Keep em muddy!
Created by Eric Jones ("MuddyBronco")
Feel free to copy and/or modify but please note author