These roadmaster springs are quite interesting. I was going to use air bags until I read about these. I'm concerned though that the roadmater's will not bring the load back to level ride height. Please post with info after you have time to test. Correct me if I'm wrong, but yours rig looks like it's squatting slightly set at 25%.
jv
They do help with the ride height, mine is not squatting completely when I set them higher at the 50% range. In fact, when I first put them on the truck before we had the camper, the 25% range raised my rear nearly an inch measured at the frame. However, they will not
completely prevent all the squatting as they are simply progressive springs that help the stock leafs. I still sit down just a smidge off of the overload leaf - at 25% I was solidly on and starting to compress that overload so I bet bumping it up gave me a good 3/4 to maybe one inch.
What attracted me is a few different factors:
1. I don't like that airbags put pressure on the frame in a place where there was not designed to be pressure. I have friends who have cracked their frames using airbags, and I have read of many bent and cracked frames in forums like these. All anecdotes, sure - yet it happens.
2. I have known people who have had maintenance problems with their airbags. Either leaking, or brackets bending, or whatever you can think of.
3. Airbags are not really *suspension*. They don't do well at absorbing shocks and bumps.
Some people love airbags, more power to them!
This is just my opinion: Opinions are like butt-holes, everyone has one and it usually stinks!
What appealed to me about the roadmaster springs is that you still use your stock suspension setup, all the weight is still on the places that the manufacturer designed to hold weight. Your suspension still goes up and down, and absorbs shock and bumps. What these do is help reduce squat, and almost completely eliminate the bouncy-bouncy-bouncy that can happen when the rear is heavily loaded. That is my personal experience, now at the 50% range I have none of that continuous bouncing on the highway, feels like empty with regard to suspension (although the center of gravity change from the camper is still noticable). Sure, the Raodmaster marketing stuff lists all kind of maybe-true-maybe-not benefits, so I don't know what to tell you there. However, before choosing I did a *lot* of searching around, and there are TONS of happy roadmaster customers with all kinds of uses on all kinds of trucks. This isn't one of those products that you only ever find their own marketing material when you search - with this thing you find all kinds of people using them on everything from small trucks to heavy duties. (Of course, they *could* be astro-turfing - but I have spoken directly with the owner of Roadmaster and a couple of his head guys and none of them sound computer-saavy enough to even know what astro-turfing even is).
These Roadmaster springs just add progressive nature to the normal leaf springs, to get rid of bouncing and bottoming out.
These pictures are with the 50% range on the roadmasters. Not the best angles because my driveway is not perfectly level (sloping towards us) and I was backed up against the house and couldn't get more distance away from the truck.
However, I will probably get a little more squatting fully loaded with gear and people - although the camper is "wet" right now, and does have about 50% of out gear in there as is so it's a pretty good indicator.
This is all just my opinion and experience. Your mileage (or squattage?) may vary.
I am going to work on weight too - trying to keep my weight down or more forward (anyone know where I can get a composite truck wheel to replace the steel spare? That alone would save me 20 lbs behind the axle.)