Can not change tire size

[matthew.bertrand]

I purchased an I-Tune programmer for my 2006 Ford 250 Super Duty about 6 months ago.
I did the auto update and programmed my engine with the 65HP tune. When I tried to
change my tire size from 33 to 35 I don't see an option in the tuner. Only the Rev/Speed Limiter
comes up & the shift points.

[mikel]

there is no option for tire size on the 6.0 Diesel fords, its in the ABS module on those trucks, not the PCM, so it cant be changed in the tune.

Thanks

[matthew.bertrand]

Thanks..