If you have a round stem gooseneck, this guide will help you know which gooseneck hitch & coupler to order. Tube Size can vary from 100mm (3-15/16″) to 4″ in diameter. Measuring through pin holes can usually tell the size. If slightly less than 4″ its a 100mm (3-15/16″ stem). Square stems can be 100mm (3-15/16″, 4″ or 4.5″. This guide is for round tube stem gooseneck.
If the pin is Angled on a metric 100mm (3-15/16″) stem then the pin angle is greater than if it is angled on a 4″ stem. Straight pin holes are the least common. A 4″ round stem with angled pins is the most common. If it has a bulldog sticker, it is going to be a 4″ stem with angled pin. If you are not sure, message us a picture of your stem.
![Round Gooseneck Stem Angle & Sizing Guide](https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg 761w, https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg?resize=150,150 150w, https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg?resize=300,300 300w, https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg?resize=324,324 324w, https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg?resize=416,416 416w, https://shockerhitch-vip.md-staging.com/wp-content/uploads/sites/2/2019/02/pin-angle-and-stem-size-round-tube-gooseneck.jpg?resize=100,100 100w)
- Tube Size can vary from 100mm (3-15/16″) to 4″ in diameter. Measuring through pin holes can usually tell the size. If slightly less than 4″ its a 100mm (3-15/16″ stem).
- If Angled on a metric 100mm (3-15/16″) then angle is greater than if it is angled on a 4″ stem.
- If you are not sure, please call 701-701-2666 or message us a picture of your stem.
Which is stronger a 5th wheel or Gooseneck?
Gooseneck hitches can pull more up to 40,000 pounds, at least 13,000 pounds more than the best fifth wheel hitch. This applies to Gooseneck Hitches with square stem and a 3″ ball coupler. There are also gooseneck hitches rated at 30,000 lbs GTW with 2-5/16″ ball couplers. Shocker Hitch Manufactures both.