275-55-20 to big for a 2wd .I have a chance to trade for these but they came off a 4wd.What size tire would be right for my truck with 20.I have 17 now.Thanks

 

Those are approximately 35 inches in diameter by 10 inches wide. They are too tall for your truck without a lift. You might get by with just leveling the front with some spring spacers, but they might still rub under some circumstances. The factory 20 come with 33 inch tires on them.

 

Thanks mine has been lower 4 inches in back.