They both do what I would consider the primary concern and that's to minimize sag in the rear end. Note, neither option INCREASES your load capability.
Timbrens are a cheaper, less complicated solution and they will stiffen the ride and the support is fixed (they are enabled or they are not, period). There are also several other passive systems that work as well, but there names escape me.
In my case I was looking to improve the ride too and this is where air bags, with the ability to vary the air pressure either makes it real stiff like a Timbrens or you can lessen the pressure a little and soften the ride. Finding that sweet spot can be tricky since psi is variable (in my case, 7 lbs to 100 lbs per bag). There is more plumbing and wiring than Timbrens to complicate things and create more failure points (I had one problem), but that goes with the complexity. I like that I can inflate the air bags high enough to raise the rear end and lower the headlight aim so I am not blinding oncoming traffic (I think the Timbrens solves that problem too, or never has that problem in the first place).
Bottom line. Timbrens is cheaper and easier to install and forget about it. Air bags can be more complicated but provide more flexibility for use. But either solves the primary load problem.
|