- Brand: ARRMA
- Part Number: Z-ARA-2179
- EAN: 5052127050715
- Product Type: Pinion Gear
- Teeth Count: 28T
- Gear Pitch: MOD 0.5
- Bore Diameter: 3.2mm
- Manufacturing Process: CNC Machined
- Compatible With: ARRMA 1/16 Mini Kraton 3S Red (C-ARA2508T1), ARRMA 1/16 Mini Kraton 3S Teal Battery and Charger Included (C-ARA2508ST2), ARRMA 1/16 Mini Kraton 3S Blue Battery and Charger Included (C-ARA2508ST1), ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 DT Teal with Battery and Charger (C-ARA2304ST1), ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 DT Black (C-ARA2304T1), ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 DT White with Battery and Charger (C-ARA2304ST2), ARRMA 1/14 TYPHON GROM 223S BLX 4x4 Blue with Battery and Charger (C-ARA2306ST2), ARRMA 1/14 TYPHON GROM 223S BLX 4x4 Red with Battery and Charger (C-ARA2306ST1), ARRMA 1/14 TYPHON GROM 223S BLX 4x4 Silver (C-ARA2306T1)
Overview
The ARRMA Pinion Gear 28T MOD 0.5 CNC 3.2mm Bore is a precision-engineered replacement pinion gear designed for RC enthusiasts who demand reliability and performance from their electric RC cars and trucks. Whether you're running a high-speed basher, a track-focused racer, or maintaining your fleet of RC vehicles, this genuine ARRMA pinion gear is an essential spare part that ensures smooth power delivery from your motor to the drivetrain. As an authorised ARRMA stockist, RC Model Shop supplies only authentic components that meet the exacting standards of this respected UK RC manufacturer.
This pinion gear is compatible with multiple ARRMA models including the 1/16 Mini Kraton 3S in various colour options, the 1/16 MOJAVE GROM 223S BLX 4x4, and the 1/14 TYPHON GROM 223S BLX 4x4, making it an ideal spare for owners of these popular brushless RC buggies and rock crawlers. The CNC machining process guarantees exceptional accuracy and durability, ensuring that every tooth meshes perfectly with your spur gear for optimal efficiency and minimal wear. If you're upgrading your RC setup or simply maintaining your vehicle with quality replacement parts, this ARRMA pinion gear delivers the precision you need.
RC enthusiasts across the UK trust ARRMA for their brushless RC vehicles, and maintaining those systems with genuine ARRMA parts ensures your investment continues to perform at its best. Whether you're a weekend basher enjoying off-road adventures, a competitive racer pushing for faster lap times, or a collector building the ultimate RC car collection, having quality replacement gears in your spares box is essential for keeping your RC hobby running smoothly.
Key Features
- 28 Teeth Configuration — The 28-tooth count is precisely engineered to deliver the right balance of acceleration and top speed for your ARRMA RC vehicle, ensuring your motor power is transferred efficiently through the drivetrain without excessive strain or energy loss.
- MOD 0.5 Gear Pitch — This modulus specification ensures perfect meshing compatibility with factory spur gears, guaranteeing smooth engagement that reduces noise, vibration and wear during high-speed running and aggressive bashing.
- 3.2mm Bore — The precisely machined 3.2mm bore diameter fits securely onto your motor shaft, providing a tight, reliable connection that prevents slippage and maintains consistent power delivery during acceleration and cornering.
- CNC Machining — Computer numerical control manufacturing creates perfectly shaped teeth with exceptional tolerances, ensuring every pinion gear delivers identical performance and durability compared to original factory components.
- Genuine ARRMA Component — As an official ARRMA replacement part, this pinion gear is designed and manufactured to the exact specifications your RC vehicle requires, delivering authentic performance that aftermarket alternatives cannot match.
- Multi-Model Compatibility — This single replacement gear works across multiple ARRMA brushless RC models, making it an economical choice for owners of multiple ARRMA vehicles who want to maintain spare parts inventory.
Technical Performance
The ARRMA Pinion Gear 28T MOD 0.5 CNC 3.2mm Bore represents the pinnacle of replacement gear engineering for modern brushless RC vehicles. The CNC machining process creates tooth profiles of exceptional accuracy, eliminating the micro-tolerances that can develop in mass-produced gears over time. When paired with the factory spur gear on your ARRMA vehicle, this 28-tooth pinion delivers the optimal power transfer ratio for the 1/16 Mini Kraton 3S, 1/16 MOJAVE GROM 223S BLX 4x4, and 1/14 TYPHON GROM 223S BLX 4x4 models, whether running on 3S LiPo battery power or the brushless motors supplied with these vehicles. The MOD 0.5 specification is industry-standard for ARRMA's compact buggy and crawler designs, ensuring perfect mesh alignment with genuine ARRMA spur gears. The 3.2mm bore diameter accommodates standard ARRMA motor shafts with a secure press-fit that maintains perfect concentricity during high-torque acceleration and sustained high-speed running. UK RC enthusiasts appreciate the durability of genuine ARRMA components, as these gears are manufactured to the same exacting standards as the original parts supplied with new ARRMA vehicles. Whether you're replacing a worn pinion after extended use, upgrading to fresh gears as preventative maintenance, or building a complete spare drivetrain for your RC car, this component delivers the performance characteristics and longevity you expect from ARRMA's engineering excellence.
What's in the Box
- ARRMA Pinion Gear 28T MOD 0.5 CNC with 3.2mm bore
Frequently Asked Questions
- Which ARRMA RC vehicles does this pinion gear fit? — This 28T pinion gear is compatible with the ARRMA 1/16 Mini Kraton 3S (available in Red, Teal, and Blue variants), the ARRMA 1/16 MOJAVE GROM 223S BLX 4x4 DT (available with or without battery and charger in Black, Teal, and White), and the ARRMA 1/14 TYPHON GROM 223S BLX 4x4 (available in Red, Blue, and Silver variants).
- Is this a genuine ARRMA component? — Yes, this is an official ARRMA replacement part manufactured to factory specifications, unlike aftermarket alternatives that may not deliver identical performance or durability.
- What does MOD 0.5 mean? — MOD (modulus) 0.5 refers to the gear pitch specification, which determines how the teeth mesh with your spur gear. This specification ensures perfect compatibility with ARRMA factory spur gears and optimal power transfer.
- What is the 3.2mm bore? — The 3.2mm bore is the internal hole diameter that slides onto your motor shaft. This size is standard for ARRMA brushless motors fitted to Mini Kraton, MOJAVE GROM, and TYPHON GROM models.
- When should I replace my pinion gear? — Pinion gears should be inspected regularly during maintenance and replaced if you notice worn teeth, broken tooth tips, or stripped sections that no longer mesh smoothly with your spur gear. Many RC enthusiasts replace gears as preventative maintenance every 50-100 hours of running time.
- What makes CNC machined gears better? — CNC machining creates tooth profiles with exceptional accuracy and consistency, eliminating manufacturing tolerances that cause vibration, noise, and accelerated wear. This results in smoother power delivery, reduced drivetrain stress, and longer component lifespan.
- Do I need any tools to install this pinion gear? — Installation typically requires a small gear puller or bearing puller to safely remove the old pinion from your motor shaft, and a vice or gear installation tool to press the new pinion securely onto the shaft. Your ARRMA vehicle's manual provides specific installation guidance.
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 Pinion Gear 28T MOD 0.5 CNC 3.2mm Bore Z-ARA-2179 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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