Traxxas Caster blocks, 6061-T6 aluminium (Green-anodised) (left & right) TRX9733-GRN

Overview

Upgrade your RC trail truck with the Traxxas Caster blocks, 6061-T6 aluminium (Green-anodised) (left & right) TRX9733-GRN — a premium suspension upgrade designed for serious RC enthusiasts who demand durability and precision. These heavy-duty caster blocks are machined from tough 6061-T6 aluminium to increase steering precision and durability whilst preserving your TRX-4M's trail-tuned steering and suspension geometry. Whether you're a seasoned RC car UK competitor, a weekend basher tackling challenging terrain, or discovering the world of RC hobby for the first time, these aluminium caster blocks represent a significant performance upgrade that will transform your driving experience.

The brilliant green anodised finish adds high-tech style to your off-road machine, making it stand out on the trail or track. These caster blocks are specifically engineered for the TRX-4M range of 1/18 scale trail trucks, including the Ford Bronco, Land Rover Defender, Chevrolet K10, and Ford F-150 High Trail models, as well as the TRX-4MT Monster Truck variants. By upgrading from plastic to these precision-machined aluminium components, you'll notice immediate improvements in steering response, suspension geometry consistency, and overall durability during aggressive driving sessions.

Installation is straightforward — simply disassemble your existing caster blocks and reassemble with these new aluminium units. Each package includes new kingpins specifically engineered for use with the aluminium caster blocks, ensuring optimal performance and longevity. This is an essential upgrade for anyone running a TRX-4M series trail truck and wanting to maximise durability and handling precision.

Key Features

• 6061-T6 Aluminium Construction — These caster blocks are machined from aerospace-grade 6061-T6 aluminium, one of the most reliable and durable aluminium alloys available for RC applications, providing exceptional strength whilst maintaining reasonable weight for optimal suspension performance.
• Green Anodised Finish — The brilliant green anodised surface coating not only provides outstanding corrosion resistance and durability, but also gives your RC trail truck a distinctive, high-tech aesthetic that stands out from standard plastic components.
• Left and Right Set — This package includes both left and right caster blocks, providing a complete front suspension upgrade that ensures symmetrical handling characteristics and balanced steering geometry across both sides of your RC vehicle.
• Increased Steering Precision — The rigid aluminium construction eliminates flex and deflection present in plastic components, resulting in more accurate and responsive steering input that directly translates to better control during technical trail driving.
• Enhanced Durability — Aluminium caster blocks withstand impacts, debris, and sustained driving stress far better than plastic alternatives, significantly extending the lifespan of your front suspension and reducing the need for frequent replacements.
• Suspension Geometry Preservation — These blocks are engineered to maintain your TRX-4M's factory trail-tuned suspension geometry, ensuring that you gain the benefits of aluminium strength without compromising the carefully calibrated handling characteristics Traxxas engineers designed into the platform.
• Included Kingpins — Each package includes new kingpins specifically engineered for compatibility with these aluminium caster blocks, eliminating the need to source additional components and ensuring optimal pivot performance.
• Simple Installation — Installation requires only basic disassembly and reassembly with your existing suspension arms — no drilling, cutting, or modification required, making this an accessible upgrade for RC enthusiasts of all skill levels.

Technical Performance

These aluminium caster blocks represent a substantial engineering upgrade over standard plastic components found on many ready to run RC crawlers and trail trucks. The 6061-T6 aluminium alloy selected for these blocks offers an exceptional strength-to-weight ratio, dimensional stability, and corrosion resistance that makes it the industry standard for precision RC suspension components. The material's rigidity means there is virtually no flex or deflection during steering inputs, eliminating the play and imprecision that gradually develops in plastic components after extended use. This directly improves steering response, particularly important when navigating rocky terrain, obstacle courses, or technical trail sections where precise wheel placement determines success or failure. The machining process ensures tolerance accuracy that maintains your TRX-4M's carefully engineered suspension geometry, preserving the trail-tuned handling characteristics whilst adding the durability benefits of aluminium. The anodised finish provides a hard, corrosion-resistant surface that protects against water exposure, mud, and general wear, making these blocks suitable for year-round RC trail driving in UK weather conditions. When installed alongside other suspension upgrades such as heavy-duty front arms, Big Bore shocks, and aluminium steering blocks, these caster blocks form the foundation of a fully upgraded, competition-grade front end capable of withstanding extreme trail conditions.

What's in the Box

• Left caster block (6061-T6 aluminium, green anodised)
• Right caster block (6061-T6 aluminium, green anodised)
• New kingpins (engineered for aluminium caster blocks)

Frequently Asked Questions

• Which RC trail trucks are these caster blocks compatible with? — These TRX9733-GRN caster blocks are engineered for the entire Traxxas TRX-4M range of 1/18 scale trail trucks, including the Ford Bronco (all colour variants), Land Rover Defender (all colour variants), Chevrolet K10 High Trail Truck, Ford F-150 High Trail Truck, and the TRX-4MT Monster Truck variants in both F-150 and K10 configurations.
• What is the advantage of aluminium caster blocks over plastic? — Aluminium caster blocks offer significantly superior durability, precision, and steering response compared to plastic components. The rigid 6061-T6 aluminium eliminates flex and play that develops in plastic over time, providing more accurate steering geometry, better control during technical driving, and substantially longer component lifespan — especially important if you're running your RC trail truck regularly on challenging terrain.
• Are these difficult to install on my TRX-4M? — Installation is straightforward and requires only basic tools and mechanical knowledge. Simply disassemble your existing plastic caster blocks and reassemble using these new aluminium units. The process involves removing a few fasteners, swapping the components, and reinstalling — no drilling, cutting, or special equipment needed. Traxxas provides exploded view diagrams for TRX-4M models to guide you through the process if you're unsure.
• Do I need any additional parts to install these caster blocks? — The package includes new kingpins specifically engineered for these aluminium blocks, so you don't need to purchase additional components. However, if your suspension arms show wear or damage, this is an ideal time to inspect them for needed maintenance or upgrade to heavy-duty variants if available for your model.
• Are these blocks available in other colours? — Yes, Traxxas manufactures these 6061-T6 aluminium caster blocks in multiple anodised colours including blue, orange, red, green, and pink, allowing you to match your RC trail truck's colour scheme or create a custom aesthetic with colour-coordinated suspension components.
• Will these caster blocks fit my Bandit or Drag Slash model? — Standard plastic-compatible caster blocks do not fit Bandit or Drag Slash models due to clearance limitations with their unique front suspension arms. However, if you upgrade to Traxxas optional Heavy-Duty front arms (available in multiple colours), these aluminium caster blocks will fit properly and provide full suspension and steering travel without interference.
• How do these blocks improve handling? — The rigid aluminium construction eliminates the flex present in plastic components, resulting in more responsive steering input, better suspension geometry consistency, and improved weight transfer characteristics — all critical factors for precise control during technical trail driving, obstacle navigation, and competitive courses.

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 Caster blocks, 6061-T6 aluminium (Green-anodised) (left & right) TRX9733-GRN 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.