Program tire size
Thread Starter
JK Newbie
Joined: Jul 2013
Posts: 72
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From: North Jersey
Program tire size
I'm selling my current wheels and tires 255-75-17 to a guy who has 225-75-16. Does he need to program pinion factor for the small increase in size? Any help is great. Thank you in advance.
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
Program pinion factor? 
If the new tires are taller/shorter than the old tires, the speedometer/odometer/mpg's will be off. A small change in height isn't a big deal. Up to him if/when he wants to recalibrate.
Just ran the numbers, that is a 3" height difference? He will likely want to recalibrate.
If the new tires are taller/shorter than the old tires, the speedometer/odometer/mpg's will be off. A small change in height isn't a big deal. Up to him if/when he wants to recalibrate.
Just ran the numbers, that is a 3" height difference? He will likely want to recalibrate.
Last edited by nthinuf; Mar 26, 2014 at 02:32 PM.
JK Newbie
Joined: Feb 2014
Posts: 63
Likes: 0
From: United States, Las Vegas
I just used a AVE pro-cal to do this, very simple to use and does a bunch of other stuff. Can we had 2nd hand for about $110-120 shipped or new for $160. if you go 2nd hand make sure the jeep it was used on gets reset to factory defaults, or the unit will not work on another jeep at all.
Dave
Dave