The bed lengths are 5.5', 6.5', and 8'.
With the 5.5', the tailgate has to be left open. If you have a super cab, most likely it has a 6.5' bed. Not a problem.
No need for ramps!! (You guys should watch his videos, they're pretty sweet)just need to purchase some ramps now.....geez! more money to spend, lol!