- Bearing Type: Ball Bearing
- Inner Diameter: 15mm
- Outer Diameter: 21mm
- Thickness: 4mm
- Shield Type: 2RS (Rubber Sealed Both Sides)
- Quantity Per Pack: 2 Bearings
- Manufacturer: ARRMA
- Part Number: Z-ARA610038
- EAN Code: 5052127036733
- Material: Precision Steel with Rubber Seals
- Construction: Hardened Steel Ball Races
- Application: ARRMA RC Vehicles - Felony 6S BLX, Infraction 6S BLX, KRATON 6S EXB 4X4 RTR, LIMITLESS 8S AVC 4X4 RTR BLX, MOJAVE 6S V2 BLX, Typhon 6S V5 BLX
Overview
The ARRMA Ball Bearing 15x21x4mm (2RS) (2) Z-ARA610038 is an essential replacement bearing set designed for high-performance RC vehicles. These premium ball-raced bearings deliver ultra-smooth operation across all driving conditions, whether you're bashing through rough terrain or racing on smooth tracks. As a critical component in your RC car, truck, or buggy, quality bearings directly impact your vehicle's speed, handling, and longevity. ARRMA's precision-engineered bearings are engineered to exacting tolerances, ensuring consistent performance and reliability that serious RC enthusiasts demand.
Whether you're running an ARRMA Felony 6S BLX, Infraction 6S BLX, KRATON 6S EXB, LIMITLESS 8S AVC, MOJAVE 6S V2 BLX, or Typhon 6S V5 BLX, these replacement bearings are the genuine OEM parts specified by the manufacturer for optimal performance. The pack includes a pair of bearings, making them ideal for replacing worn or damaged units in your RC vehicle. For RC enthusiasts in the UK looking to maintain their bashing machines or competitive racing setups, investing in quality replacement bearings like these ensures your vehicle continues to perform at its peak.
ARRMA's commitment to precision manufacturing means every bearing is built to the same exacting standards as the original equipment in your RC vehicle. These aren't generic bearings—they're specifically designed and tested for ARRMA's demanding applications, where durability and precision matter. If you've noticed any grinding, resistance, or performance loss in your RC car, UK, it's likely time to refresh your bearings with an authentic ARRMA set.
Key Features
- Premium Ball-Raced Design — These bearings feature precision ball races that enable ultra-smooth rotation and minimal friction, directly translating to faster acceleration, higher top speeds, and smoother handling throughout your driving experience.
- Rubber Shields (2RS Specification) — The dual rubber shields provide enhanced protection against the elements whilst allowing proper lubrication retention, protecting your bearings from dirt, water, dust, and moisture contamination during outdoor bashing sessions and rainy UK weather conditions.
- Precision Manufactured Tolerances — Each bearing is manufactured to consistent, exacting tolerances that guarantee fast and easy installation without modification, ensuring reliable fit with your ARRMA chassis and consistent performance over extended use.
- Optimised for ARRMA Vehicles — These bearings are specifically engineered for ARRMA's high-performance platform, ensuring they work seamlessly with your existing drivetrain components and deliver the performance ARRMA's engineers intended.
- Extended Service Life — The quality construction and sealed design mean less frequent bearing replacement, reducing your maintenance schedule and allowing you to spend more time bashing and less time wrenching on your RC vehicle.
- Pair Pack Format — Supplied as a set of two bearings, these are ideal for replacing front or rear axle bearings, steering components, or transmission shafts depending on your ARRMA model's configuration.
Technical Performance
The ARRMA Ball Bearing 15x21x4mm (2RS) represents the pinnacle of bearing engineering for mid-to-high-performance RC applications. With an inner diameter of 15mm, outer diameter of 21mm, and thickness of 4mm, these bearings are precision-ground to tolerances measured in fractions of millimetres. The 2RS designation indicates dual rubber shields on either side, a design choice that balances protection with performance—the seals keep contaminants out and lubrication in, yet allow the bearing to spin freely without the additional drag of metal shielding. The ball-raced internal construction features hardened steel balls rotating on precision-ground races, creating minimal friction and enabling the smooth, responsive handling that separates quality ARRMA vehicles from inferior competitors. Whether you're running brushless 6S LiPo power through an ARRMA platform or pushing the limits with 8S voltage on an LIMITLESS model, these bearings are engineered to handle the high rotational speeds and side loads generated by modern brushless RC motors. The construction quality ensures that bearing preload remains consistent throughout the bearing's lifespan, maintaining precise steering response and chassis geometry critical for competitive racing or aggressive bashing.
What's in the Box
- ARRMA Ball Bearing 15x21x4mm (2RS) x 2 pieces
Frequently Asked Questions
- Which ARRMA vehicles use the 15x21x4mm bearing? — This bearing size is compatible with the ARRMA Felony 6S BLX (both Black and Orange variants), ARRMA Infraction 6S BLX (Blue and Silver), ARRMA 1/8 KRATON 6S EXB 4X4 RTR Speed Monster Truck, ARRMA 1/7 LIMITLESS 8S AVC 4X4 RTR BLX Street Speed, ARRMA MOJAVE 6S V2 BLX, and ARRMA Typhon 6S V5 BLX, making them a universal replacement for these popular platforms.
- How often should I replace my RC bearings? — Bearing replacement frequency depends on driving conditions and maintenance. Aggressive bashing, water exposure, and lack of lubrication accelerate wear. If you notice grinding sounds, increased resistance, or wobbling, it's time to replace them. Many UK RC enthusiasts refresh their bearings annually or after heavy use seasons.
- What does 2RS mean on the bearing? — The 2RS specification means the bearing has two rubber seals (one on each side), protecting the internal ball races from dirt, water, and dust whilst maintaining proper lubrication retention. This makes them ideal for outdoor RC driving where moisture and contaminants are common concerns.
- Are these genuine ARRMA bearings? — Yes, these are authentic ARRMA original equipment manufacturer (OEM) bearings specified for ARRMA vehicles. The part number Z-ARA610038 is the official ARRMA designation, ensuring 100% compatibility and quality assurance.
- Can I use these bearings on other RC brands? — Whilst the dimensions are standard (15x21x4mm), these ARRMA bearings are optimised for ARRMA's specific applications. You may be able to use them on other RC vehicles using the same bearing size, but ARRMA recommends using genuine parts for your specific platform to ensure optimal performance.
- How do I install replacement bearings in my RC car? — Installation requires carefully pressing out the old bearing from its axle or shaft component using appropriate bearing pullers or a shop press, then pressing the new bearing onto the shaft until it seats fully. Consult your ARRMA vehicle's manual for specific location and installation procedures to avoid damage.
- Do I need any tools to replace these bearings? — Yes, bearing replacement typically requires a bearing puller tool to remove the worn bearing and a bearing press or shop press to install the new bearing. Many UK RC hobby shops offer bearing installation services if you're uncomfortable performing this maintenance yourself.
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 Ball Bearing 15x21x4mm (2RS) (2) Z-ARA610038 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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