BDS 4-Inch Radius Arm Lift Kit | FOX 2.0 Shocks | Ram 2500 4WD Gas 2019–2026 | SKU: 1699FS

The BDS 1699FS is a 4-inch radius arm front lift kit with FOX 2.0 Performance Series shocks for the 2019–2026 Ram 2500 4WD gas — the DT-generation platform. Heavy-duty BDS radius arms replace the factory arms, correcting caster at lift height and reducing bushing bind. Gas-tuned front coil springs deliver 4 inches of lift at the correct spring rate for the gas engine weight. FOX 2.0 damping handles the added lift height and the towing and hauling demands of the 2500 gas platform.

This kit has four hard fitment splits before it applies to your truck.

First — engine: this kit uses gas-tuned front coil springs. Ram 2500 diesel requires a different kit — gas and diesel springs are not interchangeable. Order 1660FS (FOX 2.0) or 1660FPE (FOX 2.5 PE) for the Ram 2500 diesel.

Second — generation: the 2019–2026 Ram 2500 is the DT platform. The 2018 and earlier Ram 2500 is a different platform and is not compatible with this kit.

Third — drivetrain: 4WD only. Ram 2500 2WD is not compatible.

Fourth — rear suspension: if your Ram 2500 has factory rear air ride, this kit does not apply. Order 1739FS for air ride-equipped trucks.

If you want FOX 2.5 Performance Elite shocks with external reservoir, order 1699FPE. If you want 5.5 inches of lift instead of 4, order 1681FS.

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Four fitment confirmations required before ordering.

Want FOX 2.5 PE instead of FOX 2.0? Order 1699FPE.
Want 5.5-inch lift instead of 4-inch? Order 1681FS.
Not sure if your Ram 2500 has factory rear air ride? Text (469) 407-7538 before ordering.

2019–2026 Ram 2500 Gas Lift Kit Variant Reference

Tire Clearance

At 4 inches of front lift on the 2019–2026 Ram 2500 gas platform, typical fitment runs 35–37-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

Installation Notes

Professional installation is required. The radius arm lift requires a qualified suspension shop with experience on heavy-duty truck platforms. This is not a bolt-on leveling kit. Do not attempt DIY installation.

Full front-end alignment is mandatory after installation. Do not drive on public roads before alignment is completed. Running a lifted truck without post-installation alignment causes accelerated tire wear, steering pull, and handling instability under load.

Torque all fasteners to BDS specification. Torque specs are included in the BDS installation instructions. Do not estimate torque values on a 2500-class platform.

FOX shock break-in period. Allow FOX 2.0 shocks to complete the manufacturer-recommended break-in period before aggressive off-road or heavy towing use.

Factory rear air ride confirmation. If your Ram 2500 was optioned with factory rear air suspension, this kit does not apply. Check your build sheet or window sticker for the factory air suspension option before ordering. Text (469) 407-7538 if you need help confirming before ordering.

Text (469) 407-7538 to confirm engine, rear suspension configuration, and platform before ordering.

The Obsidian Take

The BDS 1699FS is the correct kit for the 2019–2026 Ram 2500 4WD gas owner who wants 4 inches of front lift with corrected radius arm geometry and FOX 2.0 damping at the FOX 2.0 price point. Gas-tuned springs, heavy-duty BDS radius arms, track bar correction — the complete front-end geometry package for the DT platform gas, tuned for the engine weight and load demands the gas 2500 actually sees.

If you want the FOX 2.5 Performance Elite upgrade — external reservoir, higher damping performance, more tuning capability — order 1699FPE. The geometry and spring package are identical. The shock is the only variable, and it is a meaningful one if you run demanding off-road terrain or heavy towing loads regularly. For daily driving and moderate use, FOX 2.0 delivers meaningfully better damping than factory at a lower price point.

If you need 5.5 inches instead of 4, order 1681FS. If your Ram 2500 is diesel, gas-tuned springs are the wrong rate — order 1660FS or 1660FPE. If you have factory rear air ride, order 1739FS.

DT platform, gas, 4WD, standard rear suspension, 4 inches, FOX 2.0 — the 1699FS is the complete, correctly-tuned front-end solution.

Common Questions

What is the difference between 1699FS and 1699FPE?
Both kits fit the 2019–2026 Ram 2500 4WD gas and deliver 4 inches of front lift with the same BDS radius arms, gas-tuned springs, and track bar correction bracket. The only difference is the shock — 1699FS uses FOX 2.0 Performance Series and 1699FPE uses FOX 2.5 Performance Elite with external reservoir. For demanding off-road and heavy towing use, the 2.5 PE is the stronger choice. For daily and moderate use, FOX 2.0 outperforms factory and costs less.

Why can't I use diesel springs on my gas Ram 2500?
The diesel engine is significantly heavier than the gas engine on the Ram 2500 platform. Front coil springs are tuned for a specific front axle weight — diesel-tuned springs under a gas engine deliver excessive spring rate and harsh ride. Gas springs under a diesel engine sag, drop ride height, and compromise geometry under load. The correct spring tune for your engine is not interchangeable.

How do I know if my Ram 2500 has factory rear air ride?
Check your window sticker or build sheet for the factory air suspension option. The factory air ride system includes an air compressor and air bags at the rear axle in place of conventional leaf springs — visually different from a standard leaf spring setup. Text (469) 407-7538 if you need help confirming before ordering.

Does this kit lift the rear of the truck?
This kit addresses front lift via the radius arm upgrade. Rear lift components are not included. Confirm rear lift requirements with your installer before ordering if needed.

Is this a DIY install?
No. The radius arm lift requires a qualified suspension shop. This is not a leveling kit — professional installation is required.

What tire size will fit after installation?
At 4 inches of front lift on the 2019–2026 Ram 2500 gas platform, typical fitment runs 35–37-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specs with your wheel and tire supplier before ordering.

What warranty does this kit carry?
BDS suspension components carry the BDS No-Fine-Print Warranty. FOX 2.0 shocks carry a FOX 1-year limited warranty.

Verified Fitment