Ball height for towing my 2018 tab 320

barcarbarcar Member Posts: 5
I have purchased a used 2018 [email protected] 320 and will be towing it with a 2015 GMC Sierra.  The dealer has told me I will need a 2 inch ball with the top of the ball at 12  - 13 inches off a level surface.  This seems extremely low!  I currently have a 3 inch drop hitch on the truck and the 2 inch ball that is installed on it is 19 inches from the ground!  Can anyone shed some light on this?

Comments

  • dragonsdoflydragonsdofly Member Posts: 1,250
    edited March 16
    @barcar, this is going to depend on which model of [email protected] 320 you have. The standard answer on a standard [email protected] is 16" from the ground to the top of the ball will give you a level tow. You may have to differ your inches of drop/rise to accomplish this. If you have a boondock model, 18" or 19" from the ground to the top of the ball is supposed to be the sweet spot. It also depends on what kind of a load you are carrying in the tv. Does it squat when you hitch up the trailer? Adjustments need to be made then. The secret to a safe tow is as level as possible. It is always safer if you are an inch down at the coupler rather than an inch high at the coupler. Towing with the trailer's nose up, even a tiny bit can cause sway, a circumstance ALWAYS to be avoided. If you haven't picked up your trailer yet, my advice would be to approximate as accurately as you can before you got to get it. Bring a few plastic storage tubs with a total of 150/200 lbs weight that can be placed against the front of the [email protected] inside for the ride home. Load your tv with what you might carry on a trip, then you can see how level you'll be towing. These were tips given to us before we picked up our "DragonsFly", and it was super great info, as the weight in plastic tubs inside the [email protected] simulated a loaded trailer and kept it from bouncing on the ride home. An empty trailer can really bounce! What we learned on that ride home was that even though we had 16" to the top of the ball, we were about an inch high. The extra weight we brought kept the trailer from swaying, and because I had been towing boat trailers for years, when we got home, we just switched to another hitch with one more inch of drop. For us, it cost nothing to change it except 2 minutes of time. Hitch height is easily and inexpensively adjusted. I simply believe your dealer or most likely, your sales rep is misinformed. Good luck and happy [email protected]!
    2017 [email protected] sofitel([email protected])TV 2015 Silverado 2500hd(Behemoth). Wyandotte, Michigan.
    Draco dormiens numquam titilandus.
  • barcarbarcar Member Posts: 5
    Thanks so much for the great info.  For the record it is a standard [email protected]  No boondock or boondock lite.  S floorplan.  I am going to purchase a 6 inch drip hitch which shold put the ball height at 16 inches.
  • MuttonChopsMuttonChops Member Posts: 713
    For a visual reference

    2018 [email protected] 320 Spitched axle, 3020HE
    TV: 2017 Colorado V6 Z71 4x4, Tow Package, GM Brake Controller
    Adventures:  24       Nights:  157 
  • BaylissBayliss Member Posts: 529
    edited March 16
    And here's the video for the Curt Mfg. (towing products) diagram posted by @MuttonChops.

    https://www.youtube.com/watch?v=Dgmo5w7ddVw&feature=youtu.be

    Or, Draw-Tite's video.....same explanation, with a couple different diagrams for reference:

    https://www.youtube.com/watch?v=bbhgRUTyGDg
    2019 [email protected] 320 S Boondock Lite; Alde Compact 3020 Boiler; 2007 Toyota Tundra TRD (5.7L V8)
    Greg & Marlene (Tucson, AZ)


  • rkj__rkj__ Member Posts: 634
    edited March 16
    8" drop for my 2018 Sierra. In this picture, the truck and trailer are completely unloaded.  The rear of the truck sits a touch lower when loaded up for a trip. 


    2016 [email protected] 320 CS-S - 2018 GMC Sierra - St. Catharines, Ontario, Canada
  • rkj__rkj__ Member Posts: 634

    2016 [email protected] 320 CS-S - 2018 GMC Sierra - St. Catharines, Ontario, Canada
  • MuttonChopsMuttonChops Member Posts: 713
    @barcar, @rkj__     In Reference to Drop/Rise Calculation
    The Curt/Draw-Tite instructions as well as the reference figure posted above all have one minor defect;  trailer tongue weight impact on TV receiver height is not discussed.
    To have an ideal level TV & [email protected] set-up knowing how much your TV will sag in the rear based on tongue weight should be subtracted from the receiver height { A }.

    Believe Honda is the only manufacturer to include this in their Owners Manuals.  They include tables of TV sag in inches vs. tongue weight.  Suspect the goal is to help owners estimate TV capacity as tongue weight must be subtracted from TV maximum payload.

    Something to keep in mind as you decide what rise/drop is best for you.
    My Colorado is designed for towing/hauling and comes from the factory with a bit of rack, rear is visibility higher than front.  When selecting my tow bar drop I adjusted the Colorado receiver height to level with front and as Luck Would Have It the [email protected] tongue weight is in the correct range to level out the Colorado's rack.  So I have a very nice level set-up :)
    2018 [email protected] 320 Spitched axle, 3020HE
    TV: 2017 Colorado V6 Z71 4x4, Tow Package, GM Brake Controller
    Adventures:  24       Nights:  157 
  • rkj__rkj__ Member Posts: 634
    edited March 17
    @barcar, @rkj__     In Reference to Drop/Rise Calculation
    The Curt/Draw-Tite instructions as well as the reference figure posted above all have one minor defect;  trailer tongue weight impact on TV receiver height is not discussed.
    To have an ideal level TV & [email protected] set-up knowing how much your TV will sag in the rear based on tongue weight should be subtracted from the receiver height { A }.

    Believe Honda is the only manufacturer to include this in their Owners Manuals.  They include tables of TV sag in inches vs. tongue weight.  Suspect the goal is to help owners estimate TV capacity as tongue weight must be subtracted from TV maximum payload.

    Something to keep in mind as you decide what rise/drop is best for you.
    My Colorado is designed for towing/hauling and comes from the factory with a bit of rack, rear is visibility higher than front.  When selecting my tow bar drop I adjusted the Colorado receiver height to level with front and as Luck Would Have It the [email protected] tongue weight is in the correct range to level out the Colorado's rack.  So I have a very nice level set-up :)
    Since my Sierra has a payload of over 1,600 lb, it may not sag as much as some other passenger vehicles. It was a rough measurement, but last I checked, my ball was 15.5” from top of ball to ground when truck is not loaded. 
    2016 [email protected] 320 CS-S - 2018 GMC Sierra - St. Catharines, Ontario, Canada
  • GibWGibW Member Posts: 87
    I agree  with your dealer. While conventional wisdom says 16" for a 320S. Ours was not level at that height. Finally dropped it to around 12" and it rides much better. Bonus is that the spare on the back doesn't ever drag any more.
    2017 [email protected] Max-S, silver & silver, towed by a Titanium Silver 2018 Kia Sorento AWD V-6, Twin Cities MN
  • barcarbarcar Member Posts: 5
    Many thanks to all who offered their sage advice.  Wound up going with an 8 inch drop and the trailer sits nicely.
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