Overview
The Traxxas Input transmission, 20-tooth / 2.5x12mm pin (model TRX7785X) is a genuine OEM drivetrain spare part designed specifically for high-performance Traxxas RC vehicles. This transmission input gear is an essential component for maintaining optimal performance in your RC car, truck or sand buggy. Whether you're a serious racer looking to upgrade your drivetrain or a weekend basher needing a replacement part, this genuine Traxxas spare ensures your vehicle continues to deliver the speed and reliability you expect from one of the world's leading RC manufacturers.
If you own a Traxxas X-Maxx, Traxxas Funco Motorsports, or Traxxas X-Monster, this transmission input gear is the genuine spare part you need to keep your RC vehicle running at peak performance. The 20-tooth configuration with 2.5x12mm pin design has been engineered by Traxxas to deliver smooth, efficient power transfer from your motor to the transmission system. This is the authentic replacement part specified by the manufacturer, ensuring perfect compatibility and durability on your high-performance brushless RC monster truck or sand car.
Sourcing genuine Traxxas spare parts from an authorised UK RC retailer guarantees you receive factory-correct components that maintain your vehicle's performance characteristics and warranty coverage. Whether you're upgrading after wear and tear from intense bashing sessions or simply maintaining your RC car UK collection with quality spares, the TRX7785X transmission input gear represents the trusted quality that Traxxas owners rely on worldwide.
Key Features
- Genuine Traxxas OEM Part — This is an authentic factory part manufactured to Traxxas specifications, ensuring perfect fit and function with no compatibility issues when replacing worn or damaged transmission input gears.
- 20-Tooth Configuration — The precisely engineered 20-tooth design provides the optimal balance between acceleration and top-end speed for your ready to run RC monster truck or sand buggy.
- 2.5x12mm Pin Specification — The standardised pin dimension ensures secure engagement with your transmission system, preventing slippage and maintaining consistent power delivery during high-speed runs and jumps.
- Drivetrain Compatibility — Specifically engineered for Traxxas X-Maxx, X-Maxx Ultimate, X-Maxx Belted brushless models, Funco Motorsports Pro Scale sand cars, and X-Monster chassis, this is the correct replacement for your particular vehicle.
- Durable Construction — Built using robust materials and precision manufacturing standards that Traxxas applies to all their drivetrain components, ensuring longevity even under demanding bashful and racing conditions.
- Direct Replacement — No modification or adjustment required; simply install this transmission input gear directly into your Traxxas vehicle's drivetrain system for immediate performance restoration.
Technical Performance
The Traxxas TRX7785X transmission input gear is a critical component in your RC vehicle's power delivery system. This 20-tooth input gear interfaces with your brushless motor and transmission assembly, transferring rotational force efficiently from the motor shaft to the transmission's internal gearing. The 2.5x12mm pin design represents Traxxas's engineering standard for secure mechanical engagement, preventing gear slip during acceleration, deceleration, and cornering. For owners of the brushless 8S Traxxas X-Maxx RTR monsters trucks and belted 4WD variants, this transmission input gear is engineered to handle the substantial power output of brushless electric motors whilst maintaining smooth, reliable operation across a wide range of driving conditions. Whether you're operating your RC car in the UK's varied weather conditions or pushing your sand buggy to its limits during competitive events, this genuine Traxxas spare part delivers the engineering precision and durability you need. The transmission input gear experiences constant rotational stress during normal operation, making periodic inspection and replacement a wise maintenance practice for serious RC enthusiasts. By upgrading to this genuine Traxxas part, you ensure your drivetrain performs at factory specifications, maximising both speed and reliability.
What's in the Box
- 1x Traxxas Transmission Input Gear, 20-tooth, 2.5x12mm pin (TRX7785X)
Frequently Asked Questions
- Which Traxxas vehicles is the TRX7785X transmission input gear compatible with? — This transmission input gear is specifically designed for Traxxas X-Maxx Belted 4WD Brushless RTR 8S Monster Trucks (available in orange, blue, red, and green), the Traxxas X-Maxx Ultimate variants (blue X and green X models), Traxxas Funco Motorsports Pro Scale 8S 2WD Electric Sand Cars (red, blue, orange, and green), and the Traxxas X-Monster chassis platform. Always verify your specific model number before ordering to ensure perfect compatibility.
- Why would I need to replace my transmission input gear? — The transmission input gear experiences constant rotational stress and engagement with your motor's power output. Over time, particularly with aggressive bashing or high-speed running, the gear teeth can wear or become damaged. Regular maintenance and periodic replacement ensure your drivetrain continues to deliver smooth power transfer and peak performance. If you notice grinding sounds, power loss, or slipping during acceleration, it's time to inspect your transmission input gear.
- Is the 20-tooth configuration the only option available? — Traxxas engineers the 20-tooth configuration specifically for their X-Maxx and related models to provide the optimal performance balance for these vehicles. Always use the manufacturer-specified 20-tooth version to maintain your vehicle's engineered performance characteristics. Using incorrect tooth counts can alter acceleration, top speed, and motor load characteristics unpredictably.
- Can I install this transmission input gear myself? — Yes, the TRX7785X is designed as a direct replacement part requiring no modification. However, transmission installation involves working with your vehicle's drivetrain assembly, so you may prefer professional installation if you're unfamiliar with RC vehicle maintenance. Refer to your Traxxas manual for detailed installation guidance, or visit RC Model Shop where our experienced team can assist with professional fitting.
- What is the 2.5x12mm pin specification? — This specification describes the mechanical pin that secures the gear onto your vehicle's transmission shaft. The 2.5mm diameter and 12mm length dimensions are critical for proper fit and function. This standardised specification ensures your transmission input gear engages securely without play or slippage during operation.
- Is this a genuine Traxxas part or a clone? — This is an authentic, genuine Traxxas OEM (original equipment manufacturer) part, identical to the transmission input gear that comes factory-installed on new Traxxas X-Maxx and Funco Motorsports vehicles. When you order from RC Model Shop, you receive genuine Traxxas spares with full warranty support.
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 Traxxas Input transmission, 20-tooth / 2.5x12mm pin TRX7785X 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.
- Brand: Traxxas
- Model Number: TRX7785X
- EAN: 0020334778598
- Part Type: Drivetrain Spares / Transmission Input Gear
- Gear Teeth Count: 20
- Pin Specification: 2.5x12mm
- Compatible Vehicles: Traxxas X-Maxx Belted 4WD Brushless RTR 8S Monster Truck (Orange, Blue, Red, Green), Traxxas X-Maxx Ultimate (Blue X, Green X), Traxxas Funco Motorsports Pro Scale 8S 2WD Electric Sand Car (Red, Blue, Orange, Green), Traxxas X-Monster Chassis
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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