wrote:
>
> Have a new Expedition with 900 miles on it. Truck pulls to the right
> slightly. Dealer said the alignment was dead on, and it maybe radial
> pull. Is this possible on new tires?

Yes. Some tires are good, some bad. One on my car pulls pretty bad and
in 6 months there is little tread left while the others are like new.
Swap them around and see if the pull follows the tires.