[DirtyLarry]

You know that is funny, I did my 2005 HD yesterday for the 255/85R16’s that were just installed but that size wasn’t in there so I had to go with 285’s as well. I was very suprised to see actual tires sizes to select from. Apparently, I was way wrong with my previous post stating you needed rolling diameter. I swear not long ago you had to enter rolling diameter as tire sizes were not in the Tech 2 that I recall. Not sure if the latest techline updates to the Tech 2 changed that or if I confused that with the Allison Transmission DOC software. Sorry….glad it worked out though.

Fuel economy should increase on the highway but I suspect it will be a little more sluggish out of the hole. Getting rid of torque management would probably help with that part.