You guys have to remember the air bag suspension on a class 7-8 truck isn't rock hard those bags equalize side to side front to back they give like leaf springs. Its why if you have a dump truck with air bag suspension you have to dump the bags or the truck will end up greasy side up.

The air bags you guys put on your trucks are like a tire they are hard the pressure is constant it doesn't allow flex. Now you have most of the weight being supported in the frame hump like I said the weakest part of the frame.

Like I said my vote is for Timbren Springs they are used by tow truck operators etc that carry more weight that most and they have no problems with them.

If you can't drive a heavily loaded truck without it being level and rigid then you shouldn't be driving trucks. Any load under 5000lbs is a walk in the park some loads I have had on my trucks weighed close to 9000lbs.

If you know you have a heavy camper buy the proper sized truck to carry it most F-250s can be classed as a 1/2 ton truck. The tare weight is so heavy you have no payload left so legally you can only carry 2000lbs. So in the summer time you load up your 3500lb camper on the truck and become a menace to the road because the camper is so heavy the truck can't handle it.

So long story short if you need the air bags to carry your camper you bought the wrong sized truck or a camper too big for the truck you have.

 

I'm with KW, I prefer/have installed Timbrens under my truck. 6000lb capacity as opposed to 5000lb for the firestone riderites. I pull a 14k lb horsetrailer and with the Timbrens, it still is about 1/2" from touching the overload. BEST PART you ask??? With the timbrens it uses the factory suspension which is pretty darn smooth. When going over a bump loaded it just glides and bounces a little bit.. b/c RUBBER/AIR have many of the same tendencies. sure you can adjust the firestones on the fly if you have the onboard compressor/gauge, or you can back up to an air compressor and let out/air up from the valves you hid somewhere towards the back of the truck. Its all personal preference.

 

The problem with the factory overload is twofold. First the perches are to far from the spring, the truck has to be squatting pretty hard already before the overload comes into effect. Second, it is only a single leaf overload, which is'int going to help much if the load placed in the truck is heavy enough to compress the main pack far enough for it to even engage in the first place. Want to carry some real weight? Add a high quality leaf into each main spring pack and then ditch those lousy overloads for a multi leaf overload set like Kenworth was talking about.

 

Check out Super Springs (brand name), they're a self adjusting helper spring.
Don't have to mess with Hoses, PSI, and such.