King Shocks 33700-391A 3.0 IBP Front Coilovers w/Adj. for 21-26 Ram 1500 TRX/RHO

Vehicle Fitment

• 2021-2024 Ram 1500 TRX (4WD, Front)
• 2025-2026 Ram 1500 RHO (4WD, Front)

Fitment Notes

• Front axle only -- sold as a pair (left and right shipped separately)
• 4WD only -- direct bolt-on, no modifications required
• Factory-tuned to OEM TRX/RHO suspension geometry -- no aftermarket UCA required
• Companion rear shocks: King Shocks 37701-101A

Features

• 3.0" IBP Internal Bypass -- velocity-sensitive and position-sensitive damping with integrated hydraulic bump stop
• 3.0" Wide Range Compression Adjuster -- 30 precise clicks of compression damping adjustment
• 3.5" OD Pure Race Series external finned reservoirs -- increased fluid capacity and heat dissipation
• Monotube design with full-diameter piston and full-size valving
• Built to same tolerances as King's Pure Race series shocks
• Factory-tuned damping curves and spring rates specific to TRX/RHO
• Reduces shock cavitation
• Fully rebuildable, serviceable, and tunable
• Extensive dyno and real-world testing

Specifications

• Body diameter: 3.0"
• Reservoir OD: 3.5" (Pure Race Series finned)
• Compressed length: 19.547"
• Extended length: 26.322"
• Stroke: 6.776"
• Gas pressure: 200 PSI
• Compression adjuster: 30-click Wide Range
• Position: Front
• Drivetrain: 4WD
• Weight: 55 lbs (pair)

Included Components

• 2x King 3.0 IBP front coilovers (left and right)
• 2x 3.5" OD finned remote reservoirs with compression adjusters
• Installation hardware
• Installation instructions (INS-R007)

Product Description

The King Shocks 33700-391A is a pair of 3.0" IBP Internal Bypass front coilovers custom-tuned for the 2021-2024 Ram 1500 TRX and 2025 Ram 1500 RHO. The Internal Bypass design delivers both velocity-sensitive and position-sensitive damping -- the bypass tubes control damping at low to mid shaft speeds based on shaft position, while the main piston valving handles higher shaft speeds -- combined with a built-in hydraulic bump stop that provides progressive bottoming resistance without a separate external bump stop.

The 3.0" shock bodies provide greater fluid volume than conventional 2.5" units for improved thermal stability under sustained high-speed off-road use. The 3.5" OD finned remote reservoirs further increase fluid capacity and heat dissipation, extending damping consistency through the longest runs. The 30-click Wide Range Compression Adjuster allows precise tuning of low-speed compression damping to dial in ride quality across varying terrain and load conditions. Factory-tuned by King's engineering team using dynamometer testing and real-world validation specifically for the TRX/RHO platform. Fully rebuildable, serviceable, and tunable.