My trailer (ST32RL) has a GVWR of 9798 and a tongue weigh of 998 lbs. but adding propane, battery, and items in the front storage area I’m pretty sure puts be well over 1000 lbs.
The hitch is rated at 12,000 lbs. with 1200 lbs. bars. That is plenty of hitch for the trailer, but due to the tongue weight is part of the problem not having a 14,000 lbs. hitch with a 1400lb bars?
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I have the Equalizer too and IMHO you need the 1400# spring bars. At 998# dry tongue weight, you get above 1100# with just battery(s) and propane tanks, then you have to add the additional weight of cargo in your front pass through. You are probably over 1200# actual tongue weight therefore the spring bars are not working properly. Especially if your guy said they are bending too much already (I think you mentioned that). An indication they are overloaded???
I did add airbags to my truck due to its soft coil suspension, but for many other reasons aside from towing our trailer. I do get some squat on the truck and may need to adjust my L brackets up one notch next spring (it's #1 on the list to check). With my trailer, I was right on the cusp of the 1000# vs. going up to the 1200# bars. I was convinced by a few folks that the 1000# would be plenty and so far it's done well but I wonder if the 1200# would make it ride and perform better. I do have to be VERY careful on how much air is in the bags because the system needs that pressure on the spring bars to create friction and control sway. When towing the trailer, I usually run a minimum amount of air in the bags.
Like others have said, download the manual on Equalizers website, or if still unsure, call them. They are nice folks and very willing to help with their products.
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Jeff & Stacie + 2 kids
2014 Sunset Trail ST270BH
2014 Ram 1500 4x4, 5.7L Hemi 8 speed, 3.92
Propride 3P, Airlift 1000
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