SB1-6 six inch extended coupler with a 4 inch round trailer stem

SB1-6 Extended gooseneck trailer coupler with a  6 inch extension and a 4 inch Round trailer stem.

SB couplers give you more turning radius, tailgate and cab clearance.


  • SB couplers cause less than 100 pounds less tongue weight on your tow vehicle, which will not change your towing experience.
  • SB gooseneck trailer couplers are all for the standard 2-5/16 gooseneck ball.
  • SB couplers give you an additional clearance between your tow vehicle cab and the trailer nose, and between the tow vehicle tailgate and the trailer bulkhead. This gives you more clearance for additional trailer swing radius and more room for trailer hook-up.
  • SB units are fabricated using extra heavy wall high strength tubing for maximum strength, not pipe and especially standard wall pipe as most manufacturers use. SB couplers are rated at 30,000 pounds gross trailer weight.

Ships UPS or FedEx the same business day if your order is received before noon central Standard time. Free shipping to the lower 48 States.

shipping image