- Part Type: Pinion Gear
- Brand: ARRMA
- Model Number: Z-ARA-2181
- Tooth Count: 30T
- Gear Pitch: MOD 0.5
- Motor Shaft Bore: 3.2mm
- Material: Steel
- Manufacturing Process: CNC precision machined
- Set Screw Included: M3 x 4mm
- Compatible with ARRMA 1/16 Mini Kraton 3S
- Compatible with ARRMA 1/16 MOJAVE GROM 223S
- Compatible with ARRMA 1/14 TYPHON GROM 223S
- Precision manufactured tooth profile
- Precision manufactured set screw hole
Overview
The ARRMA Pinion Gear 30T MOD 0.5 CNC 3.2mm Bore is a precision-engineered replacement component designed for ARRMA's range of high-performance brushless RC models. Whether you're running a 1/16 scale Mini Kraton, 1/16 MOJAVE GROM, or 1/14 TYPHON GROM, this pinion gear is an essential spare part to keep your RC car UK-ready and performing at its best. As a dedicated hobbyist or weekend basher, having quality replacement gears on hand ensures minimal downtime and maximum fun on the track or trail.
This tough steel pinion gear provides the direct replacement you need when upgrading your drivetrain or replacing worn components. The 30-tooth configuration offers a specific gear ratio suited to ARRMA's smaller-scale models, delivering the right balance of acceleration and top speed for competitive racing and recreational bashing. ARRMA's commitment to precision manufacturing means this gear will integrate seamlessly with your existing drivetrain, providing reliable performance in extreme RC conditions.
Built from strong and durable steel, this component is engineered to withstand the demands of high-speed RC driving. The CNC manufacturing process ensures consistency and quality across every unit, making this an OEM-approved part you can trust. If you're serious about maintaining your ARRMA RC car and want to keep it running smoothly, the Pinion Gear 30T MOD 0.5 is an indispensable addition to your spares box.
Key Features
- Strong and durable steel construction — The gear is manufactured from premium steel material specifically chosen for its ability to withstand the extreme forces and vibrations encountered during high-speed RC driving, ensuring long-lasting performance even under demanding conditions.
- Precision manufactured tooth profile — Each tooth is cut to exact specifications using CNC machinery, resulting in smooth operation and efficient power transfer from the motor to the drivetrain without binding, slipping, or excessive wear.
- CNC precision engineering — Computer Numerical Control manufacturing guarantees that every pinion gear meets ARRMA's strict tolerances and quality standards, ensuring perfect mesh with your spur gear and reliable performance lap after lap.
- 3.2mm bore compatibility — The bore size is precisely engineered to fit ARRMA's 3.2mm motor shafts, providing a secure and vibration-free connection that maximises torque transfer and minimises runout.
- MOD 0.5 gear pitch — This modulus specification ensures compatibility with standard ARRMA spur gears and drivetrain components, maintaining the correct gear mesh and performance characteristics across your setup.
- Includes M3 x 4mm set screw — A high-quality set screw is provided to secure the pinion gear firmly to your motor shaft, preventing slippage during acceleration and maintaining consistent gear engagement.
Technical Performance
The ARRMA Pinion Gear 30T MOD 0.5 CNC 3.2mm Bore is engineered to deliver exceptional performance in the transmission systems of ARRMA's 1/16 and 1/14 scale brushless RC vehicles. The 30-tooth configuration works in conjunction with ARRMA's spur gears to establish the gear ratio that determines your vehicle's acceleration, top speed, and overall drivetrain efficiency. The precision-manufactured tooth profile ensures smooth meshing with your spur gear, reducing friction losses and maximising power delivery from the brushless motor to the wheels. The strong steel construction handles the extreme loads generated by powerful brushless motors, making it suitable for both racing enthusiasts and weekend bashers who demand reliability. The CNC manufacturing process guarantees that the bore hole and set screw hole are perfectly aligned and sized, ensuring secure installation without wobble or play. This pinion gear is designed to work seamlessly with ARRMA's 3S and higher LiPo battery systems commonly used in their brushless models, handling the high current and power output these systems deliver. Whether you're pushing your Mini Kraton to its limits on rocky terrain or blasting your TYPHON GROM around a race track, this gear maintains consistent performance and precise mesh geometry throughout extended run times.
What's in the Box
- 1 x 30T Pinion Gear MOD 0.5
- 1 x M3 x 4mm Set Screw
Frequently Asked Questions
- What ARRMA models is this pinion gear compatible with? — This 30T pinion gear is compatible with the ARRMA 1/16 Mini Kraton 3S, 1/16 MOJAVE GROM 223S, and 1/14 TYPHON GROM 223S models. It's an ideal replacement for standard wear and tear or when you want to modify your gear ratio to fine-tune performance.
- What does the 30T designation mean? — The 30T refers to the number of teeth on the pinion gear. Higher tooth counts increase top speed but reduce acceleration, whilst lower tooth counts improve acceleration but limit maximum speed. The 30-tooth size is optimised for ARRMA's smaller-scale models to deliver balanced performance.
- What is MOD 0.5 and why does it matter? — MOD (modulus) is a measurement of gear tooth size and pitch. MOD 0.5 is a standard specification that ensures this pinion gear meshes correctly with ARRMA's spur gears. Using mismatched gear modulus can result in poor mesh, excessive wear, and drivetrain failure.
- Is this a genuine ARRMA part? — Yes, this is an authentic ARRMA replacement component manufactured to OEM specifications. Using genuine ARRMA parts ensures proper fitment, performance, and longevity of your RC vehicle.
- What motor shaft size does this fit? — The 3.2mm bore is specifically designed for ARRMA's 3.2mm motor shafts found in their brushless motors. Never force a pinion gear onto an incorrectly sized shaft, as this can damage both the gear and motor.
- How often should I replace my pinion gear? — Pinion gears typically last a considerable amount of run time with proper maintenance. However, if you notice grinding sounds, poor acceleration response, or visible tooth damage, it's time to replace it. Keeping spares on hand is a smart idea for serious RC enthusiasts.
- What is the set screw for? — The included M3 x 4mm set screw secures the pinion gear to your motor shaft, preventing it from spinning loose during acceleration. Always ensure this screw is tight before running your vehicle, and check it regularly during maintenance intervals.
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 30T MOD 0.5 CNC 3.2mm Bore Z-ARA-2181 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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