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🧾 Overview
The TeraFlex 4.5 Inch Sport ST4 Extended-Travel Suspension System for the Jeep Gladiator JT is a complete street-and-trail lift engineered to deliver maximum capability, stability, and comfort in a dependable, maintenance-free package. Built on the proven Sport ST (Street & Trail) platform, this system provides a commanding stance with increased clearance for larger tires—without sacrificing daily-driver ride quality.
Designed with extended-travel geometry, the ST4 system safely delivers up to 16 inches of rear suspension travel, allowing the Gladiator to articulate confidently on demanding terrain. Front Control Arm Sport Frame Brackets correct steering and braking geometry to reduce nose dive, while upgraded track bar brackets properly center both axles and optimize the vehicle’s roll center. The result is predictable handling, reduced NVH, and confident performance on highway and trail alike.
Note: Shocks are not included. Falcon Performance Shocks are recommended for optimal compression, rebound, and overall vehicle stability.
✔ 4.5" extended-travel Sport ST4 suspension system
✔ Supports up to 16" of rear suspension travel
✔ Corrected steering & braking geometry with Sport Frame Brackets
✔ Optimized roll center for reduced body roll and improved handling
✔ Built for aggressive off-road use with daily-driver comfort
🛠 Installation
- Bolt-on installation using factory mounting locations. No cutting or welding required. Designed for simple install-and-drive convenience. Professional installation and alignment are recommended for optimal performance.
📌 Specs
- Key Features & Benefits
- Sport ST extended-travel design maximizes articulation and trail performance
- Front Control Arm Sport Frame Brackets improve caster and pinion geometry
- Front and rear track bar brackets recenter axles and enhance steering response
- Extended-travel rear components safely allow up to 16" of rear suspension travel
- Progressive bump stops reduce harsh bottom-out and protect components
- Rear driveshaft lowering kit improves driveline angles at higher lift heights
- Maintenance-free design delivers quiet operation and long-term reliability
- Reduced noise, vibration, and harshness for a refined ride
📘 Specifications
- Brand: TeraFlex
- System Type: Sport ST4 Extended-Travel Suspension System
- Lift Height: 4.5 inches
- Suspension Style: Short arm with geometry-correcting brackets
- Rear Travel: Up to 16 inches
- Shock Compatibility: Not included (Falcon Performance Shocks recommended)
- Vehicle Platform: Jeep Gladiator JT
- Sold As: Complete suspension system (no shocks)
- Maximum Tire Size (with proper bump stop configuration):
- Sport / Overland Fenders
- 33" – 2" front / 1" rear
- 35" – 3" front / 2.5" rear
- 37" – 4" front / 3.5" rear
- Rubicon / Mojave Fenders
- 35" – 2" front / 1" rear
- 37" – 2" front / 2.5" rear
- 39" – 4" front / 3" rear
📦 What’s Included (What’s in the Box)
- Front Components
- 4.5" front lift coil springs (PN 1874300)
- Front Control Arm Sport Frame Bracket Kit (PN 1938125)
- Front lower track bar bracket – 4.5" lift (PN 1953500)
- Progressive front bump stops (PN 1969200)
- 2" front lower bump stop strike pad extensions (PN 12-01-109-200) x2
- 0.5" front lower bump stop strike pad shims (PN 12-02-109-050) x4
- Front sway bar quick disconnect kit (PN 1764000)
- Brake line anchor kit – front (PN 1101255)
- Rear Components
- 4.5" rear lift coil springs (PN 1874400)
- Rear upper control arm axle bracket kit – extended travel (PN 1938225)
- Rear lower track bar bracket (PN 1963600)
- Progressive rear bump stops (PN 1969200)
- 1.5" rear upper bump stop extension kit (PN 1969300) x2
- 0.5" rear upper bump stop shim kit (PN 1969400)
- 0.5" rear lower bump stop strike pad shim kit (PN 1969100)
- Forged ST rear sway bar kit (PN 1774700)
- 1.5" rear driveshaft lowering kit (PN 4801000)
- Extended-travel accessory kit – rear (PN 4834100)
- Rear coil spring retainer kit – upper & lower (PN 4954000)
- Brake line anchor kit – rear (PN 1101455)
- Additional
- All required mounting hardware
🛡 Warranty
- Manufacturer-backed warranty provided by TeraFlex.
⚠️ Fitment Notes
- Jeep Gladiator JT
⚠️ Fitment Notes
- Shocks not included. Designed for extended-travel applications. Professional installation and alignment are strongly recommended. Tire fitment depends on fender type and bump stop configuration.