- Part Type: Transmission Gear
- Manufacturer: ARRMA
- Model Number: ARA311054
- Alternative Part Number: Z-ARA311054
- Gear Type: Main Input Gear
- Tooth Count: 10 teeth
- Tooth Profile: Spiral-cut
- Material: Hard-wearing steel
- Connection System: ARRMA Safe-D keyed fit
- Compatible with Input Shaft Cup: ARA310977 (Input Shaft Cup Safe-D)
- Compatible with Composite Sleeve: ARA310976 (Input Shaft Cup Sleeve 4-piece)
- Compatible with Main Diff Gear: AR310497 (43T Spiral-cut)
- Quantity Included: 1 piece
- Compatible Models: ARA7618 (1/7 FIRETEAM 6S 4X4 RTR Brushless Buggy), ARA7604V2 (1/7 MOJAVE 6S 4X4 RTR Brushless Desert Truck), ARA8608V5 (1/8 KRATON 6S 4X4 RTR Brushless Speed Truck), ARA8611V5 (1/8 NOTORIOUS 6S 4X4 RTR Brushless Stunt Truck)
- Fitment Type: Standard parts specification
- Finish: Steel
- Manufactured to OEM specification
Overview
The ARRMA Main Input Gear 10T Spiral Cut Safe-D is an essential replacement part for serious RC enthusiasts who demand reliability and consistent performance from their high-performance RC vehicles. Whether you're running an RC buggy, RC truggy, or RC truck at competitive speeds or enjoying weekend bashing sessions, this precision-engineered gear is designed to handle extreme RC conditions with ease. Constructed from hard-wearing steel, this main input gear represents the kind of quality engineering that ARRMA is recognised for throughout the UK RC community and beyond. If you're looking for a replacement transmission component that won't let you down when you need it most, this is the part to keep in your RC tool box.
This spiral-cut main input gear is specifically engineered for use with ARRMA's Safe-D keyed fit system, which provides a more secure connection to the input shaft cup and composite sleeve than traditional designs. The 10-tooth configuration delivers smooth operation even in the most demanding racing and bashing scenarios, making it ideal for both competitive RC car UK enthusiasts and recreational drivers alike. The spiral-cut tooth profile is a hallmark of quality gear design, offering superior engagement and reduced noise compared to straight-cut alternatives.
ARRMA continues to set the standard for RC transmission components, and this main input gear exemplifies their commitment to durability, performance and precision manufacturing. Whether you're rebuilding your transmission after an accident, upgrading an existing RC model, or maintaining your fleet of ready to run RC vehicles, this genuine ARRMA part ensures your drivetrain operates at peak efficiency.
Key Features
- Hard-wearing Steel Construction — The gear is manufactured from high-quality steel that resists wear and maintains dimensional accuracy through repeated use, ensuring long-lasting durability and consistent performance even in extreme RC conditions where impact and stress are common.
- Spiral-Cut Tooth Profile — Unlike straight-cut designs, the spiral-cut teeth provide smoother engagement with the mating gear, reducing noise levels and distributing loads more evenly across the tooth contact area for better overall transmission reliability.
- 10 Precision Manufactured Teeth — The exact tooth count has been engineered by ARRMA to deliver the ideal balance of torque delivery and smooth operation, ensuring predictable performance whether you're accelerating hard on a race track or navigating technical terrain.
- ARRMA Safe-D Keyed Fit System — This proprietary connection method combines a keyed fit with a composite sleeve to create a more secure interface between the input gear and the input shaft cup, reducing the risk of gear slippage and providing greater mechanical security.
- Input Shaft Cup and Composite Sleeve Compatible — Designed to work seamlessly with ARRMA's input shaft cup (ARA310977) and composite sleeve components (ARA310976), ensuring precise fitment and optimal transmission performance across compatible ARRMA RC models.
Technical Performance
This main input gear represents the kind of precision engineering that defines professional-grade RC transmission components. The spiral-cut design is a critical feature that separates quality gears from budget alternatives, as it allows for smoother power delivery and reduces the harsh engagement characteristics of straight-cut gears. The hard-wearing steel construction ensures that the gear teeth maintain their precise geometry through countless meshing cycles, which is essential for consistent acceleration response and minimal drivetrain backlash. The ARRMA Safe-D keyed fit system is engineered specifically to prevent gear slip under extreme load conditions, which is particularly important when driving high-powered brushless RC trucks, buggies and truggies across rough terrain or at high speeds. The 10-tooth configuration has been carefully selected to complement ARRMA's transmission architecture, working in conjunction with compatible main diff gears and input shaft components to deliver reliable power transfer from the motor through to the wheels. This is genuine ARRMA OEM (original equipment manufacturer) specification, meaning it meets the exact same standards as the gear supplied in new ready to run RC models fresh from the factory.
What's in the Box
- 1 x Main Input Gear 10T Spiral Cut Safe-D
What You Need to Complete
- Main Diff Gear 43T Spiral Cut (ARRMA AR310497 or ARA310497)
- Input Shaft Cup Sleeve 4-piece set (ARRMA ARA310976)
- Input Shaft Cup Safe-D (ARRMA ARA310977)
Frequently Asked Questions
- Which ARRMA RC models is this main input gear compatible with? — This gear is a standard parts fitment for several ARRMA 6S brushless models, including the 1/7 FIRETEAM 6S 4X4 RTR Brushless Buggy (ARA7618), the 1/7 MOJAVE 6S 4X4 RTR Brushless Desert Truck (ARA7604V2), the 1/8 KRATON 6S 4X4 RTR Brushless Speed Truck (ARA8608V5), and the 1/8 NOTORIOUS 6S 4X4 RTR Brushless Stunt Truck (ARA8611V5). Always verify your specific model number before ordering.
- What is the ARRMA Safe-D keyed fit system? — The Safe-D system is ARRMA's proprietary gear connection technology that uses a keyed fit combined with a composite sleeve to create a secure mechanical bond between the input gear and the input shaft cup. This design prevents gear slip during hard acceleration or when driving over rough terrain, which is a common problem with older or cheaper gear-to-shaft connections.
- Why is a spiral-cut tooth profile better than a straight-cut design? — Spiral-cut gears provide several advantages over straight-cut alternatives. The angled tooth engagement delivers smoother power transfer, produces less noise during operation, and distributes loads more evenly across the tooth contact area. This results in reduced wear, longer gear life, and more refined driving characteristics, which is especially noticeable in high-performance RC buggies and RC trucks.
- Is this a genuine ARRMA part or an aftermarket alternative? — This is a genuine ARRMA OEM (original equipment manufacturer) part, manufactured to the exact specifications of the components supplied in new ARRMA ready to run RC models. You can verify authenticity by checking the ARRMA model number ARA311054 or the alternative part number Z-ARA311054.
- How often will I need to replace this gear? — The replacement frequency depends on how heavily you use your RC vehicle. Casual recreational drivers might only need replacement after years of use, whilst competitive racers or weekend bashers running brushless motors with high-powered batteries may need replacement every 6-12 months. Regular maintenance and inspection of drivetrain components is recommended.
- Can I use this gear as an upgrade from my existing setup? — Yes, this is an excellent upgrade choice if you currently have an older ARRMA model or are rebuilding a damaged transmission. The precision-manufactured spiral-cut design and Safe-D keyed fit system represent improvements over some earlier ARRMA designs, delivering better performance and longevity.
- What tools do I need to install this gear? — Installation requires standard RC transmission tools and should only be performed by experienced builders familiar with ARRMA transmission assembly. If you're not confident in your mechanical skills, we recommend visiting a local RC specialist for professional installation and setup.
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 Main Input Gear 10T Spiral Cut Safe-D 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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