If you prefer towing your gooseneck trailer via a 5th wheel hitch, the kingpin is specially designed with zero bolster. The 4" OD round tube will fit as an inner pipe on most standard gooseneck outer tubes. Always follow manufacturer's torque specs when tightening set screws.
- 30,0000# Capacity
- 4" OD Round Tube
- 22" Long, Less Round Tube