Overview
The ARRMA Shock Set, 71mm Length, 500cSt Oil (4): GROM is an essential replacement suspension component designed specifically for owners of the ARRMA GROM 1/16 scale RC monster truck. Whether you are maintaining your existing RC car UK setup or upgrading your suspension system, this assembled shock set offers high-quality performance and ease of installation. Built with precision engineering and pre-filled with 500cSt silicone shock oil, these shocks are ready to bolt directly onto your vehicle, making them an ideal choice for both seasoned RC enthusiasts and those discovering the world of brushed RC monster trucks for the first time.
Suspension tuning is crucial to achieving optimal handling characteristics and ride quality in any RC vehicle, and the GROM shocks deliver the reliability you need. This four-piece shock absorber set is manufactured by ARRMA, a recognised brand in the RC hobby industry, ensuring that you receive genuine parts engineered to the exact specifications of your GROM chassis. The 71mm shock length is precisely calibrated for the GROM platform, providing balanced suspension geometry and consistent performance across all terrains, from carpet and pavement to grass and dirt tracks.
What sets this shock set apart is the comprehensive package of tuning components included in the box, allowing you to fine-tune your vehicle's ride height and suspension response to match your driving style and track conditions. If you are searching for a ready-to-run RC suspension upgrade or replacement parts for your brushed RC monster truck, this ARRMA shock set represents exceptional value and engineering quality.
Key Features
- Pre-filled with 500cSt Silicone Shock Oil — The shocks arrive pre-filled with premium 500cSt silicone shock oil, eliminating the need for time-consuming filling and bleeding procedures, allowing you to install the shocks and get driving immediately.
- 71mm Shock Length — Precisely engineered at 71mm to match the suspension geometry and chassis design of the ARRMA GROM, ensuring correct ride height, wheel articulation and consistent handling characteristics across all driving conditions.
- Four Assembled Shock Absorbers — The set includes four ready-assembled shock units (front left, front right, rear left, rear right), saving you assembly time and ensuring balanced suspension performance across all four corners of your vehicle.
- Clip-on Spring Preload Adjusters — Each shock includes clip-on spring preload adjusters that allow you to fine-tune your vehicle's ride height and suspension stiffness without requiring special tools, enabling quick adjustments between driving sessions and track conditions.
- Multiple Preload Spacer Sizes Included — The set includes 4mm, 2mm, 1mm and 8mm shock preload spacers, giving you granular control over suspension tuning and the ability to dial in the perfect setup for your driving preferences and terrain type.
- High-Quality Materials and Construction — Built with premium components and engineering precision, these shocks maintain consistent performance and durability, reducing maintenance and extending the life of your suspension system.
- Direct Bolt-on Installation — Designed for seamless compatibility with the ARRMA GROM chassis, the shocks feature standard mounting points and require no modification or adaptation, making installation straightforward and hassle-free.
Technical Performance
The ARRMA Shock Set represents a comprehensive suspension solution engineered specifically for the 1/16 scale GROM platform. The 71mm shock length has been precisely calculated to maintain optimal ride height geometry, suspension travel and wheel articulation essential for responsive handling and predictable vehicle behaviour across diverse driving conditions. At 500cSt, the silicone shock oil viscosity provides a balanced dampening characteristic—stiff enough to control body roll and maintain traction during cornering, yet compliant enough to absorb impacts and maintain tyre contact with varied terrain. This viscosity is particularly well-suited to the GROM's lightweight chassis and moderate speed envelope, delivering smooth suspension response whether you are bashing around a garden, navigating a local RC track or competing in organised events. The assembled design eliminates potential assembly errors and ensures that each shock is built to identical specifications, guaranteeing balanced performance from corner to corner. The inclusion of multiple preload spacer options—8mm, 4mm, 2mm and 1mm sizes—demonstrates ARRMA's commitment to allowing drivers to achieve their ideal setup; reducing preload (removing spacers) will lower the vehicle and soften the suspension, whilst adding preload (using larger spacers) will raise ride height and increase suspension stiffness. The M2.5×12mm hex head screws provide secure fastening at mounting points, whilst the spring design ensures consistent performance across extended driving sessions without degradation or inconsistency.
What's in the Box
- Assembled Shock Absorbers × 4 (pre-filled with 500cSt silicone shock oil)
- 8mm Shock Preload Spacers × 4
- 4mm Shock Preload Spacers × 4
- 2mm Shock Preload Spacers × 4
- 1mm Shock Preload Spacers × 4
- M2.5×12mm Hex Head Screws × 8
Frequently Asked Questions
- Is this shock set compatible with my ARRMA GROM? — Yes, this shock set is specifically engineered for the ARRMA GROM 1/16 scale RC monster truck platform and is compatible with all GROM variants including the GORGON GROM 4×4 RTR (available in Yellow, Bronze and Red) and the QUAKE GROM 4×4 RTR (available in Purple, Green and Red). The 71mm length and mounting geometry are precisely designed to match the GROM chassis specifications.
- Are these shocks ready to use straight from the box? — Yes, absolutely. The shocks arrive pre-filled with 500cSt silicone shock oil and are fully assembled, meaning you can install them directly onto your GROM without any additional preparation, filling or bleeding procedures. This saves significant time and makes them ideal for quick repairs or upgrades.
- What do the spring preload spacers do? — The included preload spacers allow you to adjust your vehicle's ride height and suspension stiffness. Using larger spacers (8mm, 4mm sizes) increases preload, raising ride height and stiffening the suspension, which is beneficial for high-speed bashing and reducing body roll. Using smaller spacers (2mm, 1mm sizes) or removing them entirely decreases preload, lowering ride height and softening suspension, which improves traction and compliance over rough terrain.
- Can I adjust the shocks myself? — Yes, the clip-on spring preload adjusters are designed for tool-free adjustment. You simply add or remove the included preload spacers to alter the suspension setup, allowing you to fine-tune your vehicle between driving sessions without requiring any special equipment or technical expertise.
- What is the difference between 500cSt oil and other shock oil viscosities? — Shock oil viscosity, measured in centistokes (cSt), determines how thick the oil is and how much dampening resistance it provides. 500cSt is a mid-range viscosity offering balanced performance: it is thicker than lower viscosities (300cSt) providing more controlled suspension response, yet less viscous than heavier oils (700cSt or higher) which can feel too stiff. For the GROM's 1/16 scale platform and moderate speed range, 500cSt delivers the ideal balance of handling responsiveness and impact absorption.
- Will these shocks improve my GROM's handling? — If you are replacing worn or damaged original shocks, installing this genuine ARRMA shock set will restore your vehicle to factory performance specifications and may improve handling if your original shocks were degraded. Additionally, the included preload spacers allow you to tune the suspension to your specific driving style and terrain type, potentially optimising handling characteristics beyond standard setup.
- Is this suitable for beginners? — Yes, this shock set is suitable for RC enthusiasts of all experience levels. Installation is straightforward—simply bolt the shocks onto your existing mounts using the provided hex head screws. The preload adjustment system is intuitive and requires no special tools, making suspension tuning accessible even to newcomers exploring the world of ready to run RC vehicles.
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 Shock Set, 71mm Length, 500cSt Oil (4): GROM Z-ARA-2591 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.
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