I have a 1993 pickup and have an opportunity to pick up a set of Nissan Frontier rims with really good winter tires on them.

My question is will the factory Frontier 6 hole rims fit my 6 hole truck hubs?

I have auto hubs.

I would guess the issue would be the center hole diameter and not the bolt pattern and spacing.

I know the simple way to anwer the question is to go over and try a fitting, but I want to not do the 100 mile round trip drive if I can help it.

you can call up a store that sells rims and ask to see if one rim will fit both trucks or not.