Rock Krawler TJ45X2TR 4.5-Inch X-Factor X2 Flat Belly Trail Runner Long Arm Suspension System

The Rock Krawler TJ45X2TR is the 4.5-inch X-Factor X2 Flat Belly Trail Runner Long Arm System — a comprehensive, coilover-based suspension upgrade engineered for serious off-road performance. This system represents a major evolution in long arm suspension design, featuring front and rear coilover configuration with RRD in-house built shocks at all four corners.

At the heart of this system is Rock Krawler's Flat Belly Long Arm design, the industry's only full flat belly long arm system where all control arms tuck up inside the frame rail for maximum ground clearance. Combined with an Independent 3-Link Front and Triangulated 4-Link Rear suspension layout, this system delivers the best crossover angles and geometry available in a long arm platform.

Key Features:

• 4.5-inch lift with full flat belly long arm configuration
• Independent 3-Link Front and 4-Link Rear — the original and most copied long arm design in the industry
• 5-inch rear wheelbase stretch via longer upper and lower control arms for improved approach and departure angles
• Trail Runner configuration — front and rear RRD 2.625 Remote Reservoir Coilovers for maximum off-road adjustability at all four corners
• 14-inch travel front RRD 2.625 RR coilovers yielding 15.6 inches of front axle travel
• 13-inch travel rear RRD 2.625 RR coilovers yielding 14.4 inches of rear axle travel
• Pro-X Krawler Joints featuring one-piece BASF thermo-elastomer material with 95+ degrees of misalignment on every control arm
• Adventure Series maintenance-free joints at the frame side of lower control arms for reduced maintenance and superior vibration absorption
• X2 enhanced rear geometry with improved rear instant centers and roll centers for adjustable anti-squat
• Technologically tuned Triple-Rate Coil Springs front and rear
• All RRD shocks and coilovers designed and built in-house
• Abuse-proof lifetime warranty on all hard parts

The Trail Runner System is the ideal choice for Wrangler owners who want coilover racing shock performance and adjustability at all four corners, maximizing off-road capability. Note that rear coilovers are optimized for trail use and are not recommended for heavy towing or significant cargo loading.

All Rock Krawler suspension products are designed and manufactured in the USA.