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RAS Vehicle Suspension for steadier towing and hauling
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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