Tire size increase...?
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Posting Guru
Joined: Jun 2002
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From: Panama City, Fl
Tire size increase...?
2000 F250 7.3 SD 4x4 SC long bed.....looking at going from 265/75R/16E to 285/75R/16E on the stock rims.
Currently tow/haul nothing....may get a small slide in to haul around and possible tow a car trailer once in a blue moon.....also in Fl. where there are no hills.
Read many searched posts and only found a couple referring to the issues of tranny shift points. Is it necessary to have the computer flashed to change the tire size with this small change?
Currently tow/haul nothing....may get a small slide in to haul around and possible tow a car trailer once in a blue moon.....also in Fl. where there are no hills.
Read many searched posts and only found a couple referring to the issues of tranny shift points. Is it necessary to have the computer flashed to change the tire size with this small change?
Post Fiend
Joined: May 2009
Posts: 5,470
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From: Pea Ridge, AR
Nothing really is needed to run that size tire, if you have AE or someone near you does, you can reprogram the tire size if it's needed.
My truck was actually closer to accurate with 285's than it was with 265's that were stock on it.
My truck was actually closer to accurate with 285's than it was with 265's that were stock on it.
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Posting Guru
Joined: Jun 2002
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From: Panama City, Fl
That is what I am thinking when comparing the speedometer with the GPS. I read 4-5% faster than the GPS. 60 on the GPS = 63 on the speedometer.
No one close that I know of with an AE....
No one close that I know of with an AE....
Posting Guru
Joined: Oct 2012
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From: Hat Creek Ca
I have four different rigs and am not sure if any have the "correct" size tires other than my SD, it is dead on with stock tires. In Cal, and I assume most states, there are mile posts at .5 to 1 mi intervals depending which direction you are traveling. Just check from there - they are surveyed to within about ~6" unless they are in an intersection or some other obstruction. Can't get much closer than that.
Mike
Mike
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Joined: Feb 2008
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From: Central Washington State
X2, little rub on the plastic mud flaps but a 2" shackle lift (leveler) fixed that. Speedo is right on.
Post Fiend
Joined: Feb 2008
Posts: 10,977
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From: Lancaster, Pa.
285's are on mine and no rubbing at all with stock Ford mud flaps. Although I'm thinking of upgrading to a 305 or 315 tire with new rims the 285 is a nice size tire where you won't lose to much fuel economy but fill your wheel wells a little more. Go for it.
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Post Fiend
Joined: May 2009
Posts: 5,470
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From: Pea Ridge, AR
No issue with rubbing with 285's for me either. My 315's though, I pulled back the inner fender liner, and spaced the front bumper to clear in all situations even with a 2.7" levelling kit.
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