Overview
The ARRMA Main Input Gear 10T Spiral Cut GP4 5mm is an essential replacement or upgrade component for owners of high-performance ARRMA RC vehicles. This precision-engineered gear is specifically designed for use in the transmission systems of ARRMA's most popular 4WD brushless models, including the KRATON, NOTORIOUS, OUTCAST, TALION, BIG ROCK, FIRETEAM and MOJAVE ranges. Whether you're a dedicated weekend basher, a competitive racer, or an RC enthusiast in the UK who demands reliability from their RC car parts, this main input gear delivers the durability and performance you need to keep your ARRMA machine running at peak efficiency.
As a core transmission component, the main input gear is critical to the power delivery system of your brushless RC truck or buggy. When paired with the compatible ARA310980 main diff gear, this 10-tooth spiral cut gear ensures smooth, consistent power transfer from the motor to the drivetrain. The spiral cut design is engineered to provide superior meshing characteristics compared to standard spur gears, resulting in quieter operation and improved durability under the extreme conditions that RC bashers and racers put their vehicles through. This is the perfect part to keep in your RC tool box as a spare, ensuring you can quickly get back to the track or field if your original gear experiences wear or damage.
ARRMA's reputation for building tough, reliable RC vehicles is built on high-quality components like this main input gear. Constructed from tough steel material and precision-manufactured to exacting tolerances, this gear is designed to handle the demands of high-speed 6S LiPo powered brushless RC trucks and buggies. Whether you own an ARRMA 1/8 scale speed truck, a 1/7 scale desert truck, or any other model in the ARRMA lineup that uses the GP4 configuration, having a spare main input gear on hand is a smart investment in keeping your RC experience uninterrupted.
Key Features
- Tough Steel Construction — This main input gear is manufactured from high-quality steel material that delivers long-lasting durability and consistent performance even under the demanding conditions of brushless RC racing and bashing, ensuring your investment in spare parts pays dividends through extended service life.
- 10-Tooth Spiral Cut Design — The spiral cut tooth profile is precision-engineered to provide superior meshing with the mating diff gear, delivering smoother operation, reduced noise, and improved power transfer efficiency compared to standard spur gears used in many RC cars.
- Wide Tooth Profile — The strategically designed wide tooth profile increases the gear's torque handling capabilities, allowing it to transmit the substantial power output of modern 6S brushless RC vehicles without slipping or stripping under heavy load conditions.
- Precision Manufacturing — Every tooth is precision-manufactured to exacting standards to ensure smooth, reliable operation in extreme RC conditions, whether you're racing in competitions or pushing your vehicle to its limits in aggressive bashing sessions.
- GP4 Configuration — This main input gear is specifically engineered for use with GP4 main diff gears and is compatible with the GP4 configuration found in ARRMA's most popular 4WD brushless models, ensuring perfect fitment and optimal performance.
- 5mm Shaft Size — The 5mm shaft diameter matches the motor output shaft specification of compatible ARRMA vehicles, providing secure, reliable power transmission without the risk of shaft slip or misalignment.
Technical Performance
The ARRMA Main Input Gear 10T Spiral Cut GP4 5mm represents the pinnacle of transmission component engineering for modern brushless RC vehicles. The spiral cut design is fundamentally different from traditional spur gears found on budget RC cars, offering improved load distribution across multiple teeth simultaneously, which reduces wear and extends component lifespan significantly. The steel construction provides exceptional hardness and wear resistance, essential for maintaining tolerances when operating with 6S LiPo battery systems that deliver substantial power to brushless motors. The wide tooth profile design means that torque is distributed across a larger surface area, preventing the concentrated stress that can cause teeth to strip or fracture. This is particularly important in ARRMA's high-performance 1/8 scale speed trucks like the KRATON and TALION, and 1/7 scale models like the BIG ROCK, MOJAVE, and FIRETEAM, where power outputs are extreme and drivetrain components face constant high-load stress. The precision manufacturing ensures that each tooth is cut to exact specifications, guaranteeing smooth meshing with the 43-tooth spiral cut main diff gear (ARA310980) that must accompany this component. The 5mm shaft diameter perfectly matches the output diameter of ARRMA's brushless motors, ensuring there is no lost motion or flex in the power transmission chain. Whether you're running high-speed on tarmac or tackling extreme off-road terrain, this main input gear maintains consistent performance and reliability that serious RC enthusiasts have come to expect from ARRMA's transmission components.
What's in the Box
- 1 x Main Input Gear 10T Spiral Cut GP4 5mm
What You Need to Complete
- ARA310980 — Main Diff Gear 43T Spiral GP4 5mm (must be paired with this main input gear for proper transmission function)
Frequently Asked Questions
- What ARRMA RC vehicles is this main input gear compatible with? — This 10T spiral cut main input gear is a standard parts fitment for a wide range of ARRMA 6S brushless models including the 1/8 KRATON, 1/8 NOTORIOUS, 1/8 OUTCAST, 1/8 TALION, 1/7 BIG ROCK, 1/7 FIRETEAM, 1/7 MOJAVE and various versions of these models (EXB, RTR, roller kits). It is designed specifically for vehicles using the GP4 transmission configuration.
- Why is the spiral cut design better than standard spur gears? — Spiral cut gears mesh more smoothly than spur gears because multiple teeth are in contact simultaneously, distributing the load more evenly and reducing noise, vibration and wear. This means your ARRMA RC truck or buggy will run quieter and the transmission will last longer before requiring replacement, making this a worthwhile upgrade or replacement part.
- What do I need to pair with this main input gear? — This main input gear must be used together with the ARA310980 main diff gear (43T spiral cut GP4 5mm) to function properly. These two gears work as a matched pair in your transmission, so you cannot use this gear with standard spur gears or other configurations without loss of performance and potential damage.
- Is this a genuine ARRMA part? — Yes, this is an official ARRMA replacement part with the authentic model number ARA310979. Purchasing genuine ARRMA parts ensures you receive components manufactured to the exact specifications your vehicle was designed for, maintaining reliability and performance.
- How often do main input gears need replacement? — Main input gears are tough and durable, but they will eventually wear out depending on how intensively you use your RC vehicle. Regular inspection during maintenance will show if your gear teeth are becoming worn or damaged. Keeping a spare on hand means you can get back to racing or bashing immediately rather than waiting for parts to arrive.
- Can I use this gear on any ARRMA vehicle? — No, this gear is specifically designed for ARRMA vehicles using the GP4 transmission configuration. Using it on vehicles with different transmission setups could result in poor fit, slipping, or damage. Check your vehicle's manual or our fitment guide to confirm compatibility before purchasing.
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 Main Input Gear 10T Spiral Cut GP4 5mm Z-ARA310979 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.
