Comparing Trunnion and Round Bar Weight Distribution Systems

Question:

I am looking in purchasing a weight dist. hitch and was wondering what the difference is between the round bar or Trunnion bar. Thank you

asked by: Ron

Expert Reply:

Both round and trunnion bar systems are equally as effective, but a round bar system won't have as much ground clearance under it as a trunnion bar system. This is because the bars attach to the weight distribution head from underneath. If your tow vehicle is a full sized pick-up or SUV, a round bar system would work just fine. If you're towing with a small crossover or a minivan (anything with little ground clearance) you'd definitely want to go with a trunnion bar system.

To choose a weight distribution system, you'll need to first determine the fully loaded and ready to tow tongue weight of your trailer. To that figure, add the weight of any gear stowed in the cargo area of the SUV or truck bed behind the rear axle. I've linked to an FAQ article that explains how to do this. These combined figures comprise the Total Tongue Weight (TTW) of your set-up. The TTW of your trailer should fall as close as possible to the middle of the effective range of the weight distribution system you choose. I'll also link you to an FAQ article that explains how weight distribution works.

expert reply by: Mike L