ARRMA Rear Shock Spring Pair 80mm Length 4.80lb/in Stiffness Z-AR330539

• Product Type: Rear Shock Springs (pair)
• Brand: ARRMA
• Model Number: Z-AR330539
• EAN Code: 5052127031318
• Length: 3.15 inches (80mm)
• Spring Stiffness: 4.80lb/in (0.84N/mm)
• Quantity Included: 2 x Shock Springs
• Material: Spring Steel
• Construction: Precision Manufactured
• Compatible Vehicles: ARRMA 1/10 BIG ROCK 223S DSC 4X4 RTR Brushless Monster Truck (all colour variants)
• Compatible Model Numbers: C-ARA4312V4T2 (Green), C-ARA4312V4T1 (Black), C-ARA4312V4T3 (Blue)
• Spare Part Category: Suspension Spares

Overview

The ARRMA Rear Shock Spring (2) Z-AR330539 is an essential replacement suspension component for RC enthusiasts in the UK who demand reliable performance and consistent handling from their RC vehicles. These precision-manufactured shock springs are designed to provide the durability and performance needed for serious RC car racing and recreational bashing alike. Whether you're piloting a high-performance 1/10 scale brushless RC monster truck or maintaining your existing ARRMA setup, having quality replacement shock springs on hand is crucial for keeping your vehicle running at peak performance.

As an authorised ARRMA parts supplier, RC Model Shop stocks genuine OEM suspension components that meet the manufacturer's exact specifications. The ARRMA Rear Shock Spring set delivers the consistent performance that serious RC hobbyists expect, with engineering that ensures your suspension geometry and handling characteristics remain true to the original factory settings. For anyone running an ARRMA RC car UK-wide, these springs represent an affordable investment in maintaining your vehicle's suspension integrity and overall performance on the track or in the field.

Shock springs are a high-wear component in RC racing and bashing, experiencing constant compression and extension during operation. The ARRMA Rear Shock Spring (2) Z-AR330539 is the ideal solution for replacing worn or damaged springs, ensuring your suspension maintains its original stiffness and response characteristics. These genuine OEM parts are manufactured to the same rigorous standards as the original kit components, guaranteeing compatibility and performance with your ARRMA RC vehicle.

Key Features

• Strong and Durable Spring Steel Construction — These shock springs are manufactured from high-quality spring steel that resists fatigue and maintains consistent stiffness over thousands of compression cycles, ensuring long-lasting and reliable performance during both competitive racing and casual bashing sessions.
• Precision Manufactured for Fast and Easy Fit — The springs are engineered to exact specifications, allowing for quick installation without requiring modification or adjustment, meaning you can get back on the track faster and with confidence that your suspension is set up correctly.
• OEM Quality Replacement Parts — As genuine ARRMA parts, these shock springs match the original factory specifications exactly, ensuring your vehicle's suspension geometry, handling characteristics and performance remain consistent with the manufacturer's design intent.
• Pair Pack Included — The Z-AR330539 contains two shock springs, providing a complete rear shock spring set to maintain balanced suspension performance across both rear shocks on your RC vehicle.
• Consistent Performance and Handling — Factory-correct spring stiffness ensures predictable handling and suspension response, which is essential for achieving repeatable lap times during competitive RC car racing in the UK and beyond.

Technical Performance

The ARRMA Rear Shock Spring (2) Z-AR330539 delivers engineering excellence through its precision-manufactured spring steel construction and carefully calibrated stiffness rating. With a length of 3.15 inches (80mm) and a stiffness specification of 4.80lb/in (0.84N/mm), these springs are engineered to work seamlessly with ARRMA's suspension geometry to provide the exact damping characteristics and ride height the manufacturer intended. The springs' material composition and manufacturing process ensure they maintain consistent performance through thousands of compression cycles, whether you're running high-speed backyard bashing sessions or competing in organized RC racing events. The precision manufacturing tolerances guarantee that each spring in the pair is identically matched, eliminating any handling inconsistencies that could result from springs with slightly different stiffness characteristics. For serious RC enthusiasts running brushless 4WD RC monster trucks and other high-performance ARRMA vehicles, maintaining suspension components to factory specifications is essential for achieving the handling precision and predictability needed for competitive racing and reliable performance during recreational use.

What's in the Box

• 2 x ARRMA Rear Shock Springs (80mm length, 4.80lb/in stiffness)

Frequently Asked Questions

• What ARRMA models are compatible with the Z-AR330539 shock springs? — The ARRMA Rear Shock Spring (2) Z-AR330539 is specifically designed as a replacement part for the ARRMA 1/10 BIG ROCK 223S DSC 4X4 RTR Brushless Monster Truck, with compatibility confirmed across all three colour variants: the green model (C-ARA4312V4T2), black model (C-ARA4312V4T1), and blue model (C-ARA4312V4T3). If you own any of these brushless RC monster trucks, these springs are the correct replacement choice for your rear suspension.
• How often should I replace my shock springs on my RC car? — Shock springs should be inspected regularly for signs of wear, fatigue or loss of stiffness. If you notice your vehicle's ride height is lower than normal, the suspension feels spongy or unresponsive, or if you've simply clocked many hours of driving, it's time to replace your springs. For serious racers and bashers, keeping spare shock springs on hand ensures you can always maintain peak performance. The Z-AR330539 pair provides a complete rear spring replacement, restoring your suspension to factory specifications.
• What is the difference between shock springs and other suspension components? — Shock springs specifically control the vertical movement and compression of your suspension, working in conjunction with shock absorbers and dampers to manage how your RC vehicle handles bumps and uneven terrain. The stiffness rating of these springs (4.80lb/in) is precisely calibrated to match the rest of your ARRMA suspension system, ensuring that the suspension geometry, roll characteristics and overall handling balance are maintained exactly as the manufacturer engineered them.
• Are these genuine ARRMA parts or third-party replacements? — The Z-AR330539 is a genuine OEM ARRMA part, manufactured to the exact same specifications as the springs included with new ARRMA BIG ROCK 223S kits. By choosing genuine parts, you're guaranteed compatibility and performance that matches the original factory setup, avoiding any potential handling inconsistencies that might result from using generic or third-party replacements.
• Do I need any special tools to install these shock springs? — The ARRMA Rear Shock Spring (2) Z-AR330539 is precision manufactured for fast and easy fit, meaning installation typically requires only basic RC tools such as hex drivers and screwdrivers. The springs simply need to be installed into your existing shock bodies, making this a straightforward maintenance task that most RC enthusiasts can handle themselves.
• What is the spring stiffness rating and why does it matter? — These springs feature a stiffness rating of 4.80lb/in (0.84N/mm), which is the specific stiffness that ARRMA engineered into the BIG ROCK 223S suspension system. Spring stiffness directly affects your vehicle's ride height, how it handles bumps, its cornering characteristics and overall suspension responsiveness. Using springs with the correct stiffness ensures your vehicle handles exactly as ARRMA intended, providing predictable performance and the best possible platform for tuning.

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 ARRMA Rear Shock Spring (2) Z-AR330539 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.

We want to make sure your delivery goes smoothly, so here are some important details about our service:

• For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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