There have been a variety of SuperSprings options for your 2007 Chevy Silverado 3500 Dually so it's very possible that the kit you're currently using simply isn't rated for up to 4,500 lbs so you're basically relying on only your OEM suspension.
If your SuperSprings kit isn't rated high enough then I recommend installing the SumoSprings Rebel Custom Helper Springs # SSR-201-47-2 with them since this kit is rated for 5,000 lbs and won't have any effect on your unloaded driving.
It is worth... view full answer...
The Lionshead Steel Dual Wheel # LHHA420 is intended for use with dually trucks, buses, and trailers. It is not a fit guided part but below are the specifications that if match your 2007 Chevy 3500, you can use it.
Specs:
Rim dimensions: 16" diameter x 6" wide
Bolt pattern: 8 on 6-1/2"
Flange nut size: 5/8"-18
Capacity: 3,500 lbs
Pilot diameter: 4.75"
Offset: ±5.5" view full answer...
The Reese part number RP30073 is a now discontinued under bed rail kit and not a fifth wheel hitch like it sounds like you are looking for. With that said since you are wanting a hitch that has a pivot built into the head and allows for an easier connection and disconnection the B and W Patriot part # BWRVK3255 would be a really great option. This is an American made hitch that is big favorite because of how well it's made and how easy it is to use. It would be a lot easier to connect and... view full answer...