We are sharing the below question and answer from Ed of Alaska regarding suspension systems, because it is a common question that is often on our customers minds.
Q: I'm trying to decide between the TrailAir Equa-Flex Rubber Equalizer Suspension System, and the TrailAir Center Point Suspension for a mid sized HHLS. I'm ordering the 7,000 lb axles and the 16" G tires, and Demco Hitch pin. We try to avoid interstate Hwy's. We are full timers and put about 10,000 miles per year on our rig.
What are the advantages and disadvantages of each system?
A: Long time NuWa salesman Jerry Bauder sent the below answer to Ed's question:
In my testing of HitchHikers over the years, I have used both systems extensively and think they are both worthwhile, especially if one is going to beef up the suspension and tires on a mid range trailer. Adding 500 lbs to your individual spring rating, and going to a 110 lb. air pressure tire verses an 80 lb., will definitely stiffen your trailer ride, and adding additional suspension travel will help temper that.
The TrailAir air ride is a bit softer than rubber, and also is adjustable according to the pressure you put in the bags. They start with about 5 lbs. pressure for every 1000 lbs of loaded axle weight, so 12,000 lbs on the tires will require about 60 lbs. of pressure. You can change the ride dynamic slightly by altering the pressure. Some of the down side will be more maintenance like air hoses, even though they are pretty good. Also when you have a 40 to 50 degree swing in outside temperature, that will change the bag pressure to the point that you will have to readjust for a proper ride. In the fall or early spring, that could happen every day.
We also use the TrailAir Equa-Flex rubber suspension system. It works well and adds nearly two inches to the spring travel, which you will feel. Even though the rubber will not be quite as soft, there will be little to no maintenance beyond greasing when you do your spring shackles.
Either choice is a good one, and just depends on if you mind the adjustments required with the air.
For more information, here is a link to the TrailAir website.
NuWa Industries, Inc.
This question is also available for viewing online at http://www.nuwa.com/faqs/questions/44/