Overview
The Traxxas Output 51-tooth metal gear (TRX7784X) is an essential drivetrain component for high-performance RC enthusiasts in the UK who demand durability and reliability from their vehicles. This steel output gear is engineered specifically for Traxxas X-Maxx models and other compatible platforms, delivering the robust construction needed for serious bashing and competitive RC driving. Whether you're upgrading your existing RC car UK setup or replacing worn components, this metal gear upgrade offers superior longevity compared to plastic alternatives, making it an excellent investment for anyone serious about their RC hobby.
Designed as a drop-in replacement for factory gears, the 51-tooth metal output gear transforms your RC vehicle's performance characteristics by altering the final drive ratio. This component works in conjunction with the required #7785X steel input gear to create a matched pair that optimises power delivery and torque management throughout your vehicle's drivetrain. For RC enthusiasts looking to fine-tune their brushless RC monster truck or compatible model, upgrading to metal gears is a proven method to reduce wear, increase durability, and improve overall vehicle longevity during intensive driving sessions.
RC Model Shop stocks this genuine Traxxas component for customers throughout the UK who understand that quality spare parts are the foundation of reliable RC performance. Whether you're maintaining a ready to run RC vehicle or building a custom setup, having access to authentic Traxxas replacement parts ensures your investment continues to perform at its best.
Key Features
- Steel Construction — This output gear is manufactured from hardened steel rather than plastic, providing exceptional durability and resistance to wear during intense driving sessions, whether you're pushing your RC vehicle across grass, tarmac, or rough terrain.
- 51-Tooth Design — The 51-tooth count is precisely engineered to work with the #7785X input gear, creating an optimal gear ratio that balances acceleration and top speed for your RC vehicle's specific performance characteristics.
- Metal Gear Upgrade — Upgrading from plastic to metal gears is one of the most effective drivetrain modifications for any serious RC enthusiast, reducing backlash, improving power transmission efficiency, and extending the service life of your entire drivetrain system.
- Genuine Traxxas Part — As an official Traxxas component, this gear is manufactured to strict quality standards and is guaranteed to fit perfectly with compatible models, ensuring hassle-free installation and reliable performance.
- Compatible with Multiple Models — This output gear works with an extensive range of Traxxas vehicles including the X-Maxx Belted 4WD Brushless Monster Truck, X-Maxx Ultimate, XRT VXL-8S, XRT Ultimate, and Funco Motorsports Pro Scale Sand Car, making it a versatile upgrade for many RC owners.
- Easy Installation — Designed as a direct replacement component, this gear installs quickly into the existing drivetrain assembly, making it ideal for maintenance, repairs, or performance upgrades without requiring significant mechanical modifications.
Technical Performance
The Traxxas 51-tooth metal output gear represents a significant upgrade over factory plastic components. Steel construction provides dramatically improved durability under the intense stresses of high-performance driving, particularly with brushless RC setups that deliver substantial torque and acceleration. The 51-tooth configuration works in tandem with the #7785X input gear to create a matched drivetrain pair engineered for optimal power delivery and efficiency. Metal gears reduce backlash and play in the drivetrain, translating to crisper throttle response, smoother acceleration, and more predictable handling characteristics. For RC enthusiasts running 8S LiPo batteries through brushless motors in their X-Maxx or XRT platforms, upgrading to metal gears is essential maintenance that extends component life and improves overall vehicle reliability. The hardened steel material resists stripping and tooth wear far better than plastic alternatives, ensuring your vehicle maintains peak performance over extended periods of use. This upgrade is particularly valuable for drivers who subject their RC vehicles to aggressive bashing, competitive racing, or high-torque driving situations where drivetrain stress is maximised.
What's in the Box
- Traxxas 51-tooth metal output gear (TRX7784X)
What You Need to Complete
- Traxxas #7785X steel input gear (required to complete the matched gear pair)
- Tools for drivetrain removal and installation
- Gear oil or differential lubricant for assembly
Frequently Asked Questions
- Which Traxxas RC vehicles is this 51-tooth output gear compatible with? — This metal gear is compatible with multiple Traxxas platforms including the X-Maxx Belted 4WD Brushless RTR Monster Truck (available in orange, blue, red, and green), X-Maxx Ultimate models, XRT VXL-8S and XRT Ultimate variants, and Funco Motorsports Pro Scale 8S 2WD Electric Sand Car. Compatibility spans numerous colour variants of these popular RC vehicles.
- Do I need the input gear to use this output gear? — Yes, this 51-tooth output gear requires the matching #7785X steel input gear to function properly. These components are designed to work as a matched pair, so you'll need both gears to complete your drivetrain upgrade or repair.
- Why should I upgrade from plastic to metal gears? — Metal gears offer several advantages over plastic alternatives: improved durability that extends component lifespan, reduced backlash for crisper handling response, better heat dissipation during extended driving sessions, and superior resistance to tooth stripping and wear. For anyone running a brushless RC vehicle at full throttle, metal gears are a worthwhile investment that pays for itself through reduced replacements and improved reliability.
- Is this suitable for competitive RC racing? — Yes, metal gear upgrades are standard practice in competitive RC racing circles. The improved durability and performance characteristics make this gear an excellent choice for racers who need reliable, consistent drivetrain performance throughout long competition events.
- What gear ratio does this 51-tooth gear provide? — The specific gear ratio depends on the pinion gear configuration in your vehicle, but the 51-tooth count is engineered to work optimally with Traxxas' standard drivetrain specifications across their X-Maxx and XRT platforms, balancing acceleration and top speed effectively.
- Can I install this myself? — Yes, this is a direct replacement component that installs into your vehicle's existing drivetrain assembly. You'll need basic RC mechanical skills, appropriate tools for drivetrain removal, and gear oil for assembly. If you're unfamiliar with RC maintenance, the RC Model Shop team can provide guidance or you may prefer professional installation.
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 Output 51-tooth, metal (requires #7785X input gear) TRX7784X 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.
- Manufacturer: Traxxas
- Part Number: TRX7784X
- EAN: 0020334778499
- Component Type: Output Gear
- Spare Part Category: Drivetrain Spares
- Tooth Count: 51 teeth
- Material: Steel (hardened)
- Requires: #7785X steel input gear
- Compatible Vehicles: Traxxas X-Maxx Belted 4WD Brushless RTR 8S Monster Truck (red, blue, orange, green variants), Traxxas X-Maxx Ultimate (blue X, green X variants), Traxxas XRT VXL-8S (black, green, blue, orange variants), Traxxas XRT Ultimate (blue X, green X variants), Traxxas Funco Motorsports Pro Scale 8S 2WD Electric Sand Car (red, blue, orange, green variants)
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.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
