ASSOCIATED FT 4-SHOE ADJUSTABLE CLUTCH SYSTEM AS81420

Overview

The Associated FT 4-Shoe Adjustable Clutch System (AS81420) represents a revolutionary advancement in 1/8 nitro RC racing technology, developed by Team Associated's elite Area 51 engineering team. This patent-pending clutch system fundamentally changes how you approach track-side tuning, allowing you to adjust clutch spring tension in seconds without removing springs, the clutch, or even the engine from your chassis. Whether you're a competitive racer seeking the ultimate edge or an enthusiast looking to maximise your 1/8 nitro buggy or truggy's performance across varying track conditions, this adjustable clutch system delivers unparalleled versatility and ease of use that sets it apart from traditional fixed-spring alternatives.

Born from intensive prototyping and testing following the 2016 1/8 scale World Championships, this innovative system addresses a fundamental challenge faced by nitro RC car UK racers: adapting to changing grip levels and track conditions without lengthy pit lane modifications. The ingenious design uses a single set screw that engages with a hardened steel spring cam, allowing you to rotate the cam within the hard-anodised aluminium flywheel to adjust spring tension on the fly. This means you can bring your RC buggy into the pit lane, shut down the engine, make a quick adjustment, fire it back up, and return to racing—all within minutes.

The FT 4-Shoe Adjustable Clutch System is specifically engineered for 1/8 scale nitro buggies and truggies, with suggested compatibility including the RC8B3 series and most similar vehicles in this category. For UK RC car enthusiasts serious about competitive performance or those who simply want the best possible equipment for their investment, this clutch system offers tangible advantages that justify the upgrade over standard fixed-spring alternatives.

Key Features

• Patent-Pending Adjustable Design — The revolutionary spring tension adjustment mechanism allows you to change how your clutch engages without physically swapping springs or components, giving you infinite tuning possibilities within the adjustment range and saving countless hours of pit lane work throughout a racing day.
• No Engine Removal Required — Unlike traditional clutch modifications that demand engine removal, this system lets you make adjustments without touching the powerplant, reducing downtime and allowing more time on the track where it matters most for your competitive edge.
• Pit Lane Tuning Capability — The adjustment set screw is easily accessible, enabling you to make changes between rounds or even between heats, adapting your power delivery to match current track conditions, your driving style, and grip levels in real time.
• Counter-Clockwise Reduces Tension — Turning the adjustment set screw counter-clockwise decreases spring tension, causing the clutch to engage sooner and delivering a softer, more manageable power delivery that makes your RC buggy easier to drive on lower traction tracks where wheel spin is a concern.
• Clockwise Increases Tension — Turning the adjustment set screw clockwise increases spring tension, delaying clutch engagement and producing a more aggressive power delivery response that excels on higher traction tracks where you need maximum acceleration and responsive throttle action.
• Premium Material Construction — The FT 4-Shoe Adjustable Flywheel is manufactured from hard-anodised aluminium for durability and lightweight performance, while the FT Spring Cam is crafted from hardened steel to withstand repeated adjustments and the rigorous demands of competitive nitro racing.
• Compatible with Existing Components — The adjustable flywheel and spring cam work seamlessly with all existing Team Associated 4-shoe clutch components including shoes, springs, collet, flywheel nut, and flywheel pins, making this an excellent upgrade option for those with existing Associated clutches.
• Complete System Ready to Install — This full AS81420 package includes everything needed for a complete 4-shoe clutch system installation, eliminating the need to source individual components and ensuring all parts work together perfectly out of the box.
• Upgrade Path for Existing Owners — If you already have a Team Associated 4-shoe clutch, you can purchase just the adjustable flywheel and spring cam (part #81421) separately, re-using your existing shoes, springs, collet, nut, and pins to save money on your upgrade.

Technical Performance

The Associated FT 4-Shoe Adjustable Clutch System exemplifies engineering excellence in 1/8 scale nitro racing technology. The hard-anodised aluminium flywheel provides an optimal balance between strength and weight, critical factors in maintaining engine responsiveness and overall vehicle dynamics. The hardened steel spring cam is engineered to withstand countless adjustment cycles without degradation, ensuring your tuning adjustments remain precise and repeatable throughout an entire racing season. This clutch system is specifically designed for 1/8 nitro engines commonly found in competitive RC buggies and truggies, with the four-shoe design delivering reliable engagement characteristics across the full range of adjustment. The patent-pending spring cam mechanism allows for smooth, incremental tension changes, giving you granular control over the exact point at which your clutch engages the engine's power delivery to the drivetrain. Whether you're running on a low-grip clay track that demands a softer engagement or a high-grip asphalt surface that benefits from aggressive power application, this system provides the mechanical adjustability to optimise your vehicle's performance in seconds rather than minutes or hours.

What's in the Box

• 1x Flywheel, 4-Shoe Adjustable (hard-anodised aluminium)
• 1x Spring Cam, 4-Shoe Adjustable (hardened steel)
• 4x Clutch Shoe Springs, 0.95mm
• 2x Composite Clutch Shoes
• 2x Aluminium Clutch Shoes, hard-anodised
• 1x Clutch Nut, 4-Shoe Clutch
• 1x Brass Collet, 4-Shoe Clutch
• 4x Clutch Shoe Pins, 4-Shoe Clutch
• 1x Set Screw, M3x0.5x5mm

What You Need to Complete

• Red thread-locking compound (essential for securing the set screw and ensuring it doesn't loosen during operation)

Frequently Asked Questions

• How does the FT 4-Shoe Adjustable Clutch System work without changing springs? — The system uses a single set screw that engages with a hardened steel spring cam inside the flywheel. By turning this set screw, the spring cam rotates, which changes the tension applied to the clutch springs without requiring you to physically remove or swap any springs. This innovative mechanical approach means infinite adjustment possibilities within the range without any hardware changes.
• Can I adjust the clutch while my engine is still in the car? — Yes, this is one of the system's primary advantages. The adjustment set screw is easily accessible on the flywheel, allowing you to make changes without removing the engine, clutch, or any other components from your RC buggy or truggy, saving valuable time during pit lane work.
• What track conditions benefit from counter-clockwise adjustments? — Counter-clockwise adjustment reduces spring tension, allowing the clutch to engage sooner and delivering a softer power delivery. This is ideal for lower traction tracks where you want a gentler power application to minimise wheel spin and make the car easier to control.
• When should I turn the adjustment set screw clockwise? — Clockwise adjustment increases spring tension, delaying clutch engagement and delivering more aggressive power response. This setting excels on higher traction tracks where you want maximum acceleration and responsive throttle characteristics without the engine bogging down.
• Is this system compatible with my existing Team Associated clutch? — If you already have a Team Associated 4-shoe clutch, the adjustable flywheel and spring cam (part #81421) are designed to work with your existing shoes, springs, collet, nut, and pins. For non-Team Associated clutches, the complete AS81420 system includes all necessary components.
• What vehicles is this clutch system compatible with? — The FT 4-Shoe Adjustable Clutch System is specifically designed for 1/8 scale nitro racing and works with the RC8B3 series and most 1/8 nitro buggies and truggies. If you have a different vehicle, contact RC Model Shop to verify compatibility before purchasing.
• Do I need to use thread-locking compound? — Yes, red thread-locking compound is essential for securing the M3x0.5x5mm set screw. This prevents the set screw from loosening during engine operation and ensures your clutch adjustments remain secure and repeatable throughout a racing session.
• How often can I adjust the spring tension? — The system is designed for repeated adjustments, allowing you to make changes between heats, rounds, or even during practice sessions as track conditions change. The hardened steel spring cam is engineered for longevity and precise adjustments over many racing seasons.

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 ASSOCIATED FT 4-SHOE ADJUSTABLE CLUTCH SYSTEM AS81420 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.