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Topic ClosedDifference Between a Trunnion and Round Spring Bar
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Alloy89 View Drop Down
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Posts: 7 		Direct Link To This Post Topic: Difference Between a Trunnion and Round Spring Bar
    Posted: 24 Jun 2016 at 12:26pm
Hi all,
I'm new to the forum and shopping for a RPod 172t and have a few questions on what's best for this camper, the e2 trunnion in or round bar weight distribution/sway system?  I will be towing with a 2017 Hyundai Santa Fe SE with the 3.3 engine.

Also are there any 172t owners out there and If so do you have any words of wisdom on this model?  Thanks in advance for the help, Tony
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TheBum View Drop Down
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Posts: 1407 		Direct Link To This Post Posted: 24 Jun 2016 at 1:21pm
As I understand it, a trunnion flexes less than a round bar. If the TV has a real frame, a trunnion might be better because the bars are further off the ground, so there's less chance of a scrape on the pavement when you hit a dip. If the TV is a unibody, the extra flex of the round bar may act as a shock absorber to help prevent damage to the body panels.
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M0tl3y View Drop Down
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Posts: 61 		Direct Link To This Post Posted: 24 Jun 2016 at 1:43pm
Round bar, to my understanding, is on WD hitches only. Whereas Trunnion bars are both WD and anti-sway.
The 178 club
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 24 Jun 2016 at 1:57pm
Originally posted by M0tl3y

Round bar, to my understanding, is on WD hitches only. Whereas Trunnion bars are both WD and anti-sway.

Both round and trunion provide WD and sway control. Trunion may have a bit more ground clearance, but neither is a problem. Round bar is a bit cheaper and entirely adequate.
Charlie
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OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD
PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD
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Alloy89 View Drop Down
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Posts: 7 		Direct Link To This Post Posted: 24 Jun 2016 at 2:15pm
Thanks for the feedback! What model do you guys use? Like I said my tow vehicle is a 2017 Santa Fe with a 3.3 engine rated to tow 5000 pounds.
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john in idaho View Drop Down
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Posts: 611 		Direct Link To This Post Posted: 24 Jun 2016 at 3:42pm
And look at the Andersen hitch, which is an entirely different principle - uses the compression of hard polyurethane -like on the down movement , and the relaxation of the chain on the up movement.  Supposedly less rebound.
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 24 Jun 2016 at 3:59pm
E2 600/6000. Probably the most popular WDH with RPOD owners. I towed a 172 for thousands of miles for 1.5+ years with a Pilot. Still using the E2 on a larger TT/TV combo. 
Charlie
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OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD
PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD
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TheBum View Drop Down
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Posts: 1407 		Direct Link To This Post Posted: 24 Jun 2016 at 3:59pm
I use a round bar on my 3.5L V6 Highlander, also rated 5000 pounds.
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