3 Inch Lift Kit w/ Radius Arm | Ram 3500 (13-18) 4WD | Diesel

Built for diesel truck owners who need 3 inches of front lift without sacrificing ride quality or steering geometry — this BDS radius arm kit levels your 2013–2018 RAM 3500 and clears up to 35" tires. The front uses diesel-tuned Pro-Ride coil springs paired with heavy-duty tubular radius arms and a 1-3/8" adjustable track bar to maintain correct caster correction across the full lift range. The rear gains a fabricated lift block and longer u-bolts for balanced stance and durability.

Installed and serviced at Road Runner Wheels & Tires. Most kits go in the same day. Call (678) 400-6467 to schedule.

What you get up front

• Pro-Ride diesel coil springs — full-length, progressive-rate springs engineered for heavy diesel trucks to deliver consistent lift and a predictable ride across pavement and terrain.
• HD tubular radius arms — replaces OE stamped steel with adjustable caster correction for steering geometry at any lift height, plus OE-style rubber bushings for quiet, maintenance-free operation.
• Adjustable 1-3/8" solid-steel track bar — centers the front axle at various lift heights to preserve handling and steering response.
• Sway bar links & brake line brackets — all hardware necessary for a clean, factory-style install.

Out back

A fabricated lift block, longer u-bolts, and matching shocks (your choice below) give you the 2" of rear lift needed to balance the front and maintain level ride height under load.

Pick your shocks

• NX2 Nitro Series — nitrogen-charged comfort and fade resistance for daily driving and weekend trails. The right balance of damping and longevity at the best value.
• FOX 2.0 Performance Series — velocity-sensitive damping with wider tuning range for drivers who want sharper response on rough terrain and better body control on pavement.
• FOX 2.5 Performance Elite — premium external-reservoir shocks with separately adjustable compression and rebound tuning — choose this if you tow heavy or run the truck hard in the rocks.

Important notes

• Maximum tire size is 35 x 12.5 inches. Larger tires may contact suspension or body.
• This kit is engineered for 2013–2018 RAM 3500 diesel models without air suspension (non-air-ride models only).
• Radius arm caster adjustment must be set during installation to maintain steering geometry and tire wear — your Road Runner tech handles this as part of the install.

Why customers pick this at Road Runner

• BDS suspension backed by a nationwide warranty and serviced right here — no shipping shocks around the country.
• Our technicians install these kits weekly and know the geometry inside out.
• Diesel-specific spring rates keep your truck level under load without the harshness of oversized coils.
• Adjustable track bar and radius arms mean your truck steers true and handles flat across the full lift range.
• 3" of front lift plus rear block gives you level stance and room for bigger tires without breaking driveshaft angles.

Ready to build it? Call (678) 400-6467. Hablamos Español.