Overview
The ARRMA SHIM 12.2x21x1mm is an essential precision hardware component designed for RC enthusiasts and competitive builders across the UK who demand authentic manufacturer parts for their ARRMA RC vehicles. This OEM shim is engineered to deliver precise spacing and alignment in critical drivetrain assemblies, ensuring optimal performance and longevity of your RC car, truck, buggy or crawler. Whether you're maintaining a well-used basher or preparing a competition-grade RC model for racing, genuine ARRMA shims are non-negotiable components that directly impact handling, power delivery and overall reliability.
Shims are fundamental to any serious RC hobbyist's spare parts collection, particularly for those running ARRMA's range of brushless RC buggies, trucks and crawlers. The 12.2x21x1mm specification places this shim in the mid-range category, making it compatible with various ARRMA chassis designs and drivetrain configurations. With a perfect 5 out of 5 customer rating on the manufacturer's platform, this component has proven its worth in the hands of experienced builders and casual weekend bashers alike across the United Kingdom and beyond.
ARRMA's commitment to quality means every shim meets strict manufacturing tolerances and material specifications. When sourcing replacement shims for your RC truck, RC buggy, or RC crawler, choosing genuine manufacturer components ensures you're getting the exact thickness, diameter and material composition your vehicle was designed around. This particular shim has earned widespread approval from the RC community, making it a trusted choice for anyone serious about maintaining their ARRMA RC model to factory standards.
Key Features
- Precision 1mm thickness — The exact 1mm measurement ensures accurate spacing in drivetrain assemblies where even fractional millimetres affect performance, gear mesh alignment and overall handling characteristics of your RC car or truck.
- 12.2mm inner diameter — This specification matches ARRMA's engineering standards for mid-range drive components, delivering precise fitment in suspension mounts, differential assemblies and transmission housings across multiple ARRMA models.
- 21mm outer diameter — The larger outer dimension provides adequate bearing surface and load distribution, critical for maintaining component integrity during high-torque driving conditions experienced by RC buggies, trucks and crawlers.
- Genuine OEM component — As an authentic ARRMA factory part, this shim guarantees compatibility and performance characteristics identical to original equipment, eliminating guesswork when rebuilding or maintaining your RC model.
- 5 out of 5 customer rating — Independent verification from the RC community confirms this component's reliability, quality and value for money when maintaining ARRMA vehicles of all types.
- Essential maintenance spare — Every serious RC enthusiast should maintain a stock of precision shims in various sizes, as these components wear over time and require periodic replacement to maintain optimal drivetrain performance.
Technical Performance
The ARRMA SHIM 12.2x21x1mm represents precision engineering designed to maintain the exacting tolerances required by modern RC vehicles. The 1mm thickness delivers the spacing precision necessary for proper gear mesh alignment in differential assemblies, ensuring smooth power delivery and extended component lifespan. The 12.2mm inner diameter and 21mm outer diameter combination creates an optimal bearing surface that distributes loads evenly, preventing premature wear on shafts and housings. This shim's construction utilises materials selected for durability and dimensional stability, meaning it maintains its thickness and roundness even under the high stresses experienced during aggressive driving of RC trucks, buggies and crawlers. Whether you're running a 2WD buggy on the track, a 4WD short course truck in the dirt, or a scale crawler on technical terrain, precision shims like this one form the invisible backbone of reliable performance. The exact specifications ensure compatibility across ARRMA's range of vehicles, from compact buggies to larger trucks and rock crawlers, making this a versatile component for anyone with multiple ARRMA models in their RC collection.
What's in the Box
Frequently Asked Questions
- What is a shim and why do I need one for my RC car? — A shim is a precision spacer that maintains exact distances between drivetrain components such as gears, bearings and differential assemblies. In RC vehicles, shims are essential for maintaining proper gear mesh alignment, which directly affects power delivery, handling responsiveness and component longevity. Without correct shimming, your RC truck or buggy may experience binding, excessive wear, or poor handling characteristics.
- Is the ARRMA SHIM 12.2x21x1mm suitable for beginners? — This component is best suited for builders with intermediate experience in RC maintenance and rebuilding. Beginners should familiarise themselves with their ARRMA vehicle's assembly manual before attempting shimming work, as precise installation is critical to achieving desired performance improvements.
- What ARRMA models use the 12.2x21x1mm shim? — The 12.2mm inner diameter and 21mm outer diameter specification is compatible with various ARRMA chassis designs, though specific models depend on your vehicle's generation and configuration. Always consult your ARRMA model's spare parts diagram or manual to confirm compatibility before purchasing.
- How often should I replace shims on my RC vehicle? — Shims typically last through multiple seasons of regular driving, but should be inspected during major maintenance intervals or if you notice signs of play in drivetrain components. High-intensity racing or extreme bashing may require more frequent inspection and replacement.
- Is this a genuine ARRMA part? — Yes, the Z-ARA709068 is the authentic ARRMA OEM part number, ensuring you're purchasing a factory-approved component with the correct specifications, materials and quality assurance standards that ARRMA vehicles are engineered around.
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 SHIM 12.2x21x1mm Z-ARA709068 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.
