TRX8142R

Overview

The Traxxas Suspension links, Rear upper, Red (2 pcs) represent a precision-engineered upgrade component designed specifically for TRX-4 RC crawler owners looking to enhance their vehicle's suspension performance and ground clearance. These replacement rear upper suspension links are an essential part of the #8140R TRX-4 Long Arm Lift Kit, a modification system that transforms your RC crawler's geometry for improved articulation and obstacle-climbing capability. Whether you're a seasoned RC enthusiast in the UK running your TRX-4 on rocky trails, or someone looking to upgrade their trail-crawling setup, these links deliver the durability and precision fitment that Traxxas is renowned for in the RC crawler community.

Built from premium red powder-coated steel, these suspension links combine robust material science with meticulous manufacturing to withstand the demanding forces of technical off-road terrain. The pre-assembled hollow ball joints ensure smooth articulation while minimising weight, a critical consideration in RC crawler design where suspension compliance directly impacts traction and the ability to maintain contact with uneven surfaces. These links are not a casual upgrade—they're a core component of a comprehensive suspension geometry modification that serious RC 4x4 crawlers use to unlock their vehicle's true potential on challenging UK trail courses.

RC Model Shop stocks the complete range of Traxxas upgrade components, and these rear upper suspension links are available for immediate ordering. They're specifically engineered to work in harmony with the Long Arm Lift Kit system, ensuring perfect compatibility and performance that matches Traxxas' original engineering specifications.

Key Features

• Red powder-coated steel construction — The robust steel material provides exceptional durability and strength compared to plastic alternatives, ensuring these links can withstand the repeated impacts and high stress loads encountered during technical rock crawling and trail running. The red powder coating adds a layer of corrosion protection whilst contributing to the distinctive aesthetic upgrade appearance of the Long Arm Lift Kit system.
• Pre-assembled hollow ball joints — The suspension links arrive fully assembled with hollow ball joints already installed, eliminating the need for additional assembly work and ensuring perfect ball joint geometry from the factory. Hollow ball joints reduce unsprung mass whilst maintaining full articulation range, a critical factor in maintaining tyre contact on rocky terrain where suspension flex determines whether your RC crawler can complete difficult obstacles.
• 5x115mm dimensions — The specific 5mm diameter with 115mm length specification is precisely engineered to work as a matched pair in the rear upper suspension position of the TRX-4 when equipped with the Long Arm Lift Kit. These exact dimensions ensure proper suspension geometry angles, which directly affect how your crawler sits on the chassis and how the suspension arms move through their full range of motion.
• Designed for Long Arm Lift Kit compatibility — These suspension links are specifically engineered to work with the #8140R TRX-4 Long Arm Lift Kit, a comprehensive suspension geometry upgrade that raises the roll centre, increases suspension stroke, and transforms the TRX-4's approach and departure angles for superior obstacle negotiation and ground clearance on extreme terrain.
• Two-piece set — You receive a matched pair of suspension links, giving you complete coverage for both rear upper suspension positions on your TRX-4. This ensures symmetrical suspension geometry and balanced handling characteristics essential for predictable performance on technical courses.

Technical Performance

These Traxxas rear upper suspension links represent the convergence of materials science and RC suspension geometry engineering. Manufactured from powder-coated steel rather than plastic, they deliver structural rigidity and impact resistance that translates directly to reliability during extended trail sessions on demanding UK off-road courses. The 5x115mm specification places these links in a geometric configuration that, when combined with the Long Arm Lift Kit system, fundamentally alters the TRX-4's suspension architecture. The long-arm suspension geometry increases the distance between the pivot points of the suspension arms and the tyres, which mathematically increases suspension leverage and articulation range—critical advantages when navigating steep rocky inclines, large boulders, and complex technical sections where maintaining tyre contact determines success or failure. The hollow ball joints provide full three-dimensional articulation whilst maintaining a low rotational friction coefficient, enabling smooth, responsive suspension movement that directly translates to better ground contact and traction. For RC crawler enthusiasts running technical courses or rock crawling events, suspension geometry is not an afterthought—it's the foundation of performance. These links, as components of a larger Long Arm Lift Kit system, represent a serious upgrade pathway for TRX-4 owners seeking competition-level performance and capability.

What's in the Box

• Traxxas Suspension links, rear upper, red (2 pcs)
• Pre-assembled hollow ball joints

What You Need to Complete

• #8140R TRX-4 Long Arm Lift Kit (these links are designed to work with this specific kit)
• Traxxas TRX-4 chassis
• Basic metric hex driver tools (included with the TRX-4)

Frequently Asked Questions

• What is the purpose of upgrading to the Long Arm Lift Kit with these suspension links? — The Long Arm Lift Kit fundamentally changes the TRX-4's suspension geometry by increasing the distance between pivot points and the wheel contact patch, which increases suspension articulation range and improves the vehicle's ability to climb obstacles, maintain ground contact on uneven terrain, and achieve better approach and departure angles when navigating rocks and technical obstacles. These rear upper suspension links are essential components of that system, positioning the suspension arms in the new geometry configuration.
• Are these suspension links compatible with all TRX-4 variants? — These suspension links are specifically designed for TRX-4 models equipped with the #8140R Long Arm Lift Kit. They are not compatible with stock TRX-4 suspension geometry. Ensure you have or are planning to install the complete Long Arm Lift Kit system before purchasing these links.
• What is the advantage of powder-coated steel over plastic suspension links? — Steel provides significantly greater impact resistance and durability compared to plastic, particularly in the high-stress rear upper suspension position where suspension loads and lateral forces are substantial during technical crawling. Steel also offers better resistance to deformation under load, maintaining precise geometry across countless terrain impacts, which ensures consistent handling and suspension performance throughout an extended RC crawler's lifespan.
• Do these suspension links come pre-assembled or do I need to assemble them? — The suspension links arrive fully pre-assembled with hollow ball joints already installed and ready to use. This eliminates assembly work and ensures perfect factory geometry. You simply install them onto your TRX-4 chassis as part of the Long Arm Lift Kit upgrade process.
• What tools are needed to install these suspension links? — Installation requires basic metric hex drivers and potentially a small amount of threadlock compound for screw retention. The standard Traxxas tool kit that accompanies your TRX-4 contains all necessary tools. For added convenience and control, Traxxas offers the optional 8712 7-Piece Metric Hex and Nut Driver Essentials Set, which provides premium hex and nut driver bits plus a convenient carrying pouch.
• Will upgrading to these suspension links improve my TRX-4's crawling performance? — Yes, when installed as part of the complete Long Arm Lift Kit system, these rear upper suspension links contribute to significantly improved crawling performance. The upgraded suspension geometry allows better articulation, increased ground clearance, and improved obstacle-climbing capability. Users report noticeable improvements in technical terrain performance and the ability to negotiate obstacles previously impossible with stock suspension geometry.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Traxxas Suspension links, Rear upper, Red (2 pcs) (5x115mm, powder coated Steel) (assembled with hollow balls) (for use with #8140R TRX-4 Long Arm Lift Kit) TRX8142R today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.