- Product Type: Shock Pistons and Cartridge Spacers
- Quantity: 4 shock sets (4 pistons, 4 spacers)
- Part Number: ARA330570 / Z-ARA330570
- Brand: ARRMA
- Shock Piston Specification: 8x1.2mm
- Piston Hole Diameter: 1.2mm
- Number of Holes per Piston: 8
- Material: Tough and durable composite
- Manufacturing: Precision manufactured for smooth and consistent shock performance
- Scale: 1/5
- Compatible Models: ARRMA 1/5 Kraton 8S 4X4 RTR Brushless Speed Truck, ARRMA 1/5 Kraton 8S EXB 4X4 Roller Brushless Speed Truck, ARRMA 1/5 Outcast 8S AVC 4X4 RTR Brushless Stunt Truck
- Part Category: Suspension - Shocks & Shock Parts
Overview
The ARRMA Shock Pistons & Cartridge Spacers set is an essential replacement part for owners of high-performance 1/5 scale RC trucks. Whether you're running an ARRMA Kraton 8S or Outcast 8S, these precision-engineered components are designed to keep your suspension performing at its absolute best. If you've been bashing your brushless RC speed truck hard or simply want to refresh your shock internals after extended use, this genuine ARRMA parts set delivers the quality and reliability you need to maintain consistent handling and responsive shock action across all terrain types.
Shock pistons and cartridge spacers are critical internal components that directly affect how your RC truck's suspension absorbs impacts and manages weight transfer during acceleration, braking and cornering. Over time, these parts can wear, affecting shock performance and overall vehicle handling. This OEM replacement set provides everything needed to restore your shocks to factory specifications, ensuring smooth and predictable suspension behaviour whether you're bashing in the garden, tackling rough terrain or pushing your brushless 8S RC truck to the limit on track.
Designed specifically for ARRMA's flagship 1/5 scale models, this shock piston and spacer kit represents genuine manufacturer parts with the engineering precision that ARRMA is recognised for. These aren't generic alternatives – they're the same components supplied with new ARRMA RC trucks, guaranteeing perfect compatibility and performance that aftermarket options simply cannot match.
Key Features
- Complete 4-shock set — This package includes pistons and spacers for all four shocks on your RC truck, allowing you to service your entire suspension system in one go and restore uniform performance across all corners of your vehicle.
- Precision-manufactured tolerances — Each piston is manufactured to exacting standards to ensure smooth and consistent shock performance, eliminating inconsistencies that can develop in worn or damaged original components and giving you predictable handling in all driving conditions.
- Tough composite material construction — The pistons are crafted from high-quality durable composite material engineered for long-lasting performance and consistent shock action, resisting wear from repeated compression and extension cycles even during aggressive bashing sessions.
- 8-hole piston design with 1.2mm diameter holes — The precision 8 holes in each piston, each machined to exactly 1.2mm diameter, create the perfect restriction for damping fluid flow and allow fine-tuning of your shock response characteristics for different driving styles and terrain types.
- OEM ARRMA parts — These are genuine manufacturer parts, not aftermarket alternatives, guaranteeing perfect fit and performance with your ARRMA Kraton 8S or Outcast 8S RC truck without any compatibility concerns.
Technical Performance
Built to exacting engineering standards, these shock pistons and cartridge spacers represent the same level of quality and precision that ARRMA applies across their entire suspension system design. The composite material offers an ideal balance between durability and performance characteristics, maintaining consistent damping properties across temperature ranges and driving conditions. Each piston features 8 precisely drilled holes with 1.2mm diameter specifications, creating the exact restriction profile needed for optimal damping fluid flow rates. This design allows suspension oil to pass through the piston at a controlled rate during shock compression and extension, which directly influences how quickly your 1/5 scale RC truck settles after hitting bumps, jumps and obstacles. The cartridge spacers work in conjunction with the pistons to manage internal shock volumes and ensure proper oil displacement, contributing to smooth and progressive damping characteristics. Whether you're piloting an 8S brushless speed truck like the Kraton or the stunt-focused Outcast, these components are engineered to maintain consistent suspension performance across hard landings, high-speed cornering and technical terrain navigation. The composite construction resists fatigue and degradation that can occur in plastic alternatives, ensuring these parts maintain their performance characteristics through extended use on your RC truck.
What's in the Box
- 4 x Shock Pistons (8x1.2mm)
- 4 x Shock Cartridge Spacers
Frequently Asked Questions
- Which ARRMA RC trucks are compatible with these shock pistons and spacers? — These parts are designed as standard and optional replacement components for the ARRMA 1/5 Kraton 8S 4x4 RTR Brushless Speed Truck and the ARRMA 1/5 Outcast 8S AVC 4x4 RTR Brushless Stunt Truck. They fit both standard and EXB variants of these models. If you own either of these high-performance 1/5 scale brushless RC trucks, these genuine ARRMA parts will be fully compatible with your vehicle's suspension system.
- Why would I need replacement shock pistons and spacers for my RC truck? — Shock pistons and cartridge spacers are wear items that gradually degrade through normal use as damping fluid continuously flows across the piston holes during every compression and extension cycle. Over time, the composite material can develop micro-cracks, the holes can enlarge slightly, or pistons can become scored, all of which reduce shock performance. Additionally, if you've crashed hard or damaged your suspension internals, these components may need replacement. Restoring them with genuine OEM parts ensures your suspension returns to factory specifications and your RC truck handles predictably.
- Are these shock components difficult to install? — Installing shock pistons and cartridge spacers requires disassembling your shock cartridges, which demands mechanical aptitude and proper tools. You'll need to carefully remove the shock shaft, access the internal cartridge components, and precisely reassemble everything to ensure proper function. Most experienced RC hobbyists can handle this job, though you may wish to consult your ARRMA manual for detailed instructions specific to your truck model. If you're uncertain about the process, asking for guidance from other RC enthusiasts or your local RC Model Shop team before attempting the work is advisable.
- How do shock pistons affect my RC truck's handling and suspension performance? — Shock pistons directly control how damping fluid flows through your suspension during impacts and movement, which fundamentally shapes how your RC truck's suspension responds to terrain. Worn pistons with enlarged holes allow oil to flow too quickly, resulting in harsh, unpredictable suspension action and poor bump absorption. Properly functioning pistons with precise 1.2mm holes deliver controlled damping that allows your suspension to absorb impacts smoothly while maintaining vehicle stability. Fresh pistons and spacers help restore the suspension characteristics your RC truck was engineered to deliver, making it handle more predictably whether you're bashing aggressively or driving technically on challenging terrain.
- How often should I replace my shock pistons and spacers? — This depends entirely on your driving intensity and style. Casual weekend bashers might go 12-24 months between shock services, whilst competitive drivers or those doing frequent high-speed running might service shocks every 6-12 months. If you notice your RC truck's suspension feeling less responsive, your shocks performing inconsistently corner-to-corner, or you've experienced significant crashes, it's time to consider replacing these internal components. Regular shock maintenance keeps your brushless RC truck performing at its best.
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 Pistons & Cartridge Spacers (4 Shocks) Z-ARA330570 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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