IAJack

My truck an trailer setup is:
2013 SCAB
4X4
Bilstein 5100's set on 1.75 to level the front
Falken Wildpeaks in 275/65/18's in E rated
1200 payload
24 ft TT 3400lbs dry with 350 tougne weight
EAZ-LIFT weight distro hitch

The truck a trailer pull great and ride great as it is and no sway, but the rear does sag 1-2 inches when hooked up to the trailer. I though about adding airbags to maybe improve the ride and prevent the sag until I read about the RAS. Will a RAS do anything for my like improve ride and prevent the sag?

8100hd

Flamingtaco

You may like how RAS or airbags stiffen the rear, but both systems trade rear sag for weight over the front wheels with bumper trailers. You've extended the front suspension arms with the level, RAS or airbags will extend it further. I'd start with adjusting the WDH to see if you can pull some more level out of it because neither RAS nor bags are going to do much to level the truck without lightening the front end.

It's simple physics: The rear suspension is a pivot point. Adding height at the pivot point against weight at the rear bumper requires taking weight off the other end of the vehicle. Just like a see-saw.

jeffinthebag

It's supposed to sag a bit. 1 to 4 inches is normal.