RAS adds adjustable support to leaf springs, helping reduce squat and body roll under load. Choose standard (2,000 lbs) or heavy duty (3,000 lbs) to match your typical weight; heavier tuning can make the unloaded ride feel firmer. Works well with weight distribution hitches and can raise the rear about 1-2", improving stability without ongoing maintenance.
RAS can raise the rear about 1-2 inches, which adds rake. That rear lift helps reduce squat under load, but you should recheck hitch height to keep your trailer level front to back. If you're towing a fifth wheel, reducing truck squat is good, but confirm the trailer isn't riding nose-high after installation and adjust as needed.
Installation is generally straightforward. It can often be done without removing the wheels, and setup goes quicker with a helper or lift. After mounting, match pre-tension left to right and fine-tune for your load. If model-specific instructions aren't in the box, use the universal guide and verify the correct steps for your truck before tightening.
Choose standard if you want support with a comfortable unloaded ride. Heavy-duty can feel stiff when unloaded, even at the lightest pre-load, but offers more support under heavier loads. RAS does not add payload capacity. You can adjust pre-tension to suit your typical load; if it feels too stiff, back it off, and if you need more support, tighten it up.
Unloaded ride impact is minimal with the standard setup, while heavy-duty can feel stiff when not carrying weight. Drivers reported reduced body roll and better control, even on bumpy roads. RAS is maintenance-free—no airing up or down—so it's ready whenever you hook up a trailer or add cargo.
Yes, RAS helps reduce rear-end sag and improves stability when towing. Users paired it with a weight distribution and sway control system and noted the truck sat level with much less drop. After hookup, recheck your hitch setup and spring bar tension. Expect a small rear lift that can change the rake, so verify your setup sits close to level.
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