14" frame with the 5th wheel bracket built in.
17" frame the 5th wheel bracket is built in
20" frame the 5th wheel assembly is optional
22" frame with adjustable 5th wheel/axle bracket.
K139
K100
K101
K102
K103
K104
K167
K106
K107, K108
K109, K110
K111
K131, K132
