Numbers generally refer to bed size, the first two numbers refer to “Inches wide”, with the second set of numbers referring to “Feet long”
548 – 54 inches wide, and 8 feet long
6310 – 63 inches wide, and 10 feet long
Letters refer to certain aspects of a trailer, H stands for heavy duty axles (rated at 3500 pounds). No H means standard axles (rated at 2000 pounds).
6310: has a standard 2000 pound axle
6310H: has a 3500 pound axle
6810: has a standard 2000 pound axle
6810H: has a 3500 pound axle
BT refers to a bi-folding tailgate, This is a type of tailgate that folds, horizontally, down a split in the center of the tailgate to make the trailer’s overall height lower.
6810H: has a single piece tailgate
6810HBT: has a folding tailgate
TILT means that the trailer has no tailgate, the trailer tilts using hydraulics, this means the entire bed tilts for loading and unloading.
6810HTILT: no tailgate
MCT is a special type of trailer designed to pull behind a motorcycle. MCT stands for MotorCycle Towable.