Overview
The Traxxas 11-T Pinion Gear Differential (Rear) TRX7791 is an essential replacement drivetrain component designed for serious RC enthusiasts in the UK who demand reliability and performance from their high-end RC vehicles. This heavy-duty steel pinion gear is engineered to work seamlessly with the matching 35-tooth differential ring gear (part #7792), delivering consistent power transfer and smooth differential operation. Whether you're a competitive racer, an experienced basher, or someone looking to maintain or upgrade their RC car UK setup, this genuine Traxxas spare part ensures your vehicle performs at its best.
Compatible with a comprehensive range of top-tier Traxxas models including the legendary X-Maxx 4WD brushless RC monster truck, the X-Maxx Ultimate, the XRT VXL-8S and XRT Ultimate high-speed buggies, and the Funco Motorsports Pro Scale sand car, this pinion gear is built to withstand the demands of aggressive driving and competitive use. The 11-tooth configuration provides the optimal balance between acceleration and top-end speed, making it a trusted choice for drivers who want their brushless RC trucks and buggies to perform consistently, race after race and bash session after bash session.
As an authorised Traxxas dealer, RC Model Shop stocks only genuine OEM parts that meet the manufacturer's exacting standards for fit, durability and performance. When you choose this heavy-duty pinion gear, you're investing in peace of mind and reliable operation for your premium RC model, knowing you have a part engineered and tested by the industry leaders.
Key Features
- Heavy-duty steel construction — Manufactured from premium-grade steel, this 11-tooth pinion gear delivers exceptional durability and resistance to wear, ensuring it maintains precise engagement with the differential ring gear even under the most demanding driving conditions and high-performance racing scenarios.
- Perfect pairing with 35-tooth ring gear — Designed specifically to work with the #7792 heavy-duty differential ring gear, this pinion creates a matched differential system that ensures smooth power delivery, reduced backlash and improved overall drivetrain efficiency across your brushless RC vehicle.
- Optimised 11-tooth ratio — The 11-tooth configuration strikes the perfect balance between acceleration response and top-end speed capability, making it ideal for both competitive racing applications and weekend bashing on various terrains and track surfaces.
- Genuine Traxxas OEM part — As an authentic Traxxas component, this pinion gear is engineered to exact factory specifications and has undergone rigorous testing to ensure it meets the highest standards of quality, precision and reliability expected from the Traxxas brand.
- Wide model compatibility — This rear differential pinion gear is compatible with multiple premium Traxxas platforms including the X-Maxx series, XRT series, X-Monster, and Funco Motorsports Pro Scale, giving you flexibility across your RC car collection.
- Drop-in replacement — Designed as a direct replacement for worn or damaged pinion gears, installation is straightforward and requires no modification to your existing differential housing or supporting components.
Technical Performance
The Traxxas TRX7791 represents the pinnacle of drivetrain component engineering, delivering the precision and durability required by competitive RC enthusiasts and serious hobbyists. Constructed from heavy-duty steel, this 11-tooth pinion gear has been precisely machined to tolerances that ensure perfect meshing with the corresponding 35-tooth differential ring gear, minimising friction losses and maximising power transmission efficiency. The steel material composition provides superior resistance to the constant stresses of acceleration, deceleration and torque reversal that occur during aggressive driving, whether you're running a brushless RC monster truck at full throttle across rough terrain or executing precision manoeuvres on a competitive racing circuit. The 11-tooth specification offers an optimal gear ratio for drivers seeking responsive acceleration combined with strong top-end speed capability, making it equally at home in high-speed track racing or mixed-terrain bashing applications. This component is engineered to work in perfect harmony with the #7792 35-tooth heavy-duty differential ring gear, creating a differential assembly that delivers smooth, predictable power delivery with minimal backlash and maximum efficiency. For drivers of Traxxas X-Maxx 4WD brushless RC monster trucks, X-Maxx Ultimate models, XRT VXL-8S high-performance buggies, or Funco Motorsports Pro Scale sand cars, this pinion gear ensures your drivetrain maintains factory-specification performance and reliability.
What's in the Box
- 1x Traxxas 11-tooth heavy-duty steel pinion gear (TRX7791)
Frequently Asked Questions
- Which Traxxas models is the TRX7791 compatible with? — This rear differential pinion gear is compatible with a wide range of premium Traxxas vehicles including the X-Maxx Belted 4WD brushless RC monster truck (all colour variants), X-Maxx Ultimate, X-Monster chassis, XRT VXL-8S, XRT Ultimate, and Funco Motorsports Pro Scale 8S sand cars. Always verify your specific model number before ordering to ensure correct fitment.
- What is the 11-tooth ratio best suited for? — The 11-tooth pinion gear offers an excellent balance between acceleration and top speed, making it versatile for both competitive racing and recreational bashing. It's the standard specification for many high-performance Traxxas models, ensuring your vehicle performs at its designed capability level.
- Do I need to replace the ring gear at the same time? — For optimal performance and to minimise differential wear, it is recommended to use this 11-tooth pinion gear with the matching #7792 35-tooth heavy-duty differential ring gear. Using mismatched gear sets can result in poor meshing, increased backlash and premature wear on both components.
- Is this a genuine Traxxas part? — Yes, the TRX7791 is an authentic Traxxas OEM (original equipment manufacturer) spare part, manufactured to exact factory specifications and quality standards. RC Model Shop stocks only genuine Traxxas components, ensuring you receive a product that delivers the durability and performance Traxxas owners expect.
- What material is this pinion gear made from? — This pinion gear is constructed from heavy-duty steel, which provides superior strength, durability and resistance to wear compared to lighter materials. The steel construction ensures the gear can handle the high torque loads generated by brushless motors in high-performance RC vehicles.
- Will this improve my RC car's performance? — If your current pinion gear is worn, damaged or not the optimal specification for your driving style, replacing it with this genuine Traxxas part will restore or improve your vehicle's performance, smoothness and reliability. However, this is primarily a replacement/maintenance component rather than a performance upgrade in the traditional sense.
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 11-T Pinion Gear Differential (Rear) TRX7791 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: TRX7791
- EAN: 0020334779106
- Product Type: Rear Differential Pinion Gear
- Spare Part Category: Drivetrain Spares
- Tooth Count: 11-tooth
- Material: Heavy-duty steel
- Specification: Heavy-duty
- Compatible Ring Gear: #7792 35-tooth heavy-duty differential ring gear
- Compatible Vehicles: Traxxas Funco Motorsports Pro Scale 8S 2WD Electric Sand Car (Red, Blue, Orange, Green variants), 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 X-Monster Chassis, Traxxas XRT VXL-8S (Green, Black, Blue, Orange variants), Traxxas XRT Ultimate (Blue X, Green X 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.
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- 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.
