Originally Posted by next1051
The Flex has a class 3 hitch. 4500Lbs and 450 tongue weight. 2 inch receiver. I'm not happy with the rear end sag. I keep all the heavy stuff to the rear of the axle and dont load much in the front storage box. I'm not over loading the rear of the car either. I don't really want to add helper bags or air shocks. I thought a wdh would help.
Unfortunately, there are quite a few posters in this section who have no recent or real world experience with PUPs and A-frames. Some of the information they post is misleading, or just plain wrong, because of the differences between PUPs and travel trailers.
You can certainly get a WDH for your Rockwood/Flex, and yes it will help a great deal with the back end sag, improve your ride, and help prevent sway (the most dangerous towing condition, IMHO). And yes, contrary to a post, WDH works just as well with single axle trailers as with tandem axle trailers.
I owned a 2000 Coleman Westlake (12ft box), towed with a 1993 Ford Explorer and no WDH - and it was miserable. Sway usually began at 62 MPH, and driving I-80 over Emigrant Pass (we camped at Lake Tahoe every summer for 8 years) was a white-knuckled experience.
Last year, we bought a 2014 Rockwood A122 (12ft box A-frame) to be towed by our 2008 Hyundai Entourage (minivan). When I test drove the combo at the dealership (no WDH) as part of the delivery, there was pretty significant porpoising - rear of minivan and camper bouncing up and down - even at 25-30 mph speeds.
I went back inside, and talked to the parts guys, mechanics, and sales. They agreed on an Equalizer E2 600/6000, and installed it for $330, and dialed it in pretty well. The difference was phenominal - the minivan rode very close to stock, there was no sway in cross-winds at 75 mph, and the minivan rear end had a reasonable ground clearance. My wife was even comfortable driving while towing at 65 mph in 30 mph cross-winds across Nebraska on I-80 - and I slept while she drove.
The 600/6000 was chosen because there wasn't room on the trailer frame for the recommended installation position of the L-brackets that hold the bars. We ended up at about 28" (29"-32" recommended), so used the heavier 600/6000 instead of the 400/4000 model. Even then, the propane tank platform had to be raised an inch to install the brackets.
I would never tow a 2000+ lb camper with a soft suspension vehicle without WDH again - it really is that good.
Yes, they do make WDH for small rigs, and yes, they will likely do what you want. I have no experience outside of Equalizer, but I do enjoy the combined WDH and anti-sway of the Equalizer. It is very easy to hook up and remove by raising the tongue jack to relieve pressure on the bars.
The 2 drawbacks of the Equalizer are the weight of the hitch head, and the groaning of the bars in the brackets while cornering at low speeds (never heard above 25 mph). But the groaning sound means the anti-sway is working, and I'm good with it.
2014 Rockwood A122 (typical actual tow weight of 2700 lbs)
2008 Hyundai Entourage (3500 lb tow rating)
camping Colorado and adjacent states one weekend at a time