Overview
The Traxxas Gear Set (overdrive) TRX7886 is a premium transmission upgrade designed for serious RC enthusiasts running X-Maxx and XRT vehicles. This high-performance component replaces your standard transmission gears with a specially engineered 24-tooth input gear and 47-tooth output gear combination, fundamentally transforming your vehicle's performance characteristics. Whether you're an experienced RC car UK competitor or a dedicated weekend basher looking to push your brushless RC monster truck to its limits, this overdrive gear set opens up entirely new possibilities for customisation and speed tuning.
This is not a casual upgrade—the Traxxas Gear Set (overdrive) is specifically engineered for advanced drivers with previous experience operating large radio-controlled vehicles capable of high-speed performance and rapid acceleration. The overdrive gearing system increases your upper range of available gearing options, extending well beyond what standard high-speed gears can achieve when paired with aftermarket low KV motors. For RC enthusiasts in the UK seeking to maximise their vehicle's potential with quality transmission components, this gear set represents a significant investment in serious performance tuning.
The engineering behind this gear set is straightforward yet powerful: by altering your final drive ratio, it effectively adds 5-6 teeth to your pinion gear setup, giving you unprecedented flexibility in your gearing strategy. This allows you to run smaller pinion gears whilst maintaining the performance characteristics you want, reducing load on your motor and improving overall drivetrain efficiency. If you're running a high-performance aftermarket motor in your X-Maxx or XRT and want to unlock higher top speeds with proper low KV motor compatibility, this overdrive transmission gear set is the upgrade you've been waiting for.
Key Features
- 24-Tooth Input Gear Design — The precisely manufactured 24-tooth input gear works in concert with the output gear to create an overdrive ratio that extends your gearing options significantly beyond factory specifications, allowing you to optimise performance with aftermarket low KV motors that would otherwise run too fast with standard transmission gears.
- 47-Tooth Output Gear — This carefully engineered 47-tooth output gear combines with the input gear to deliver the overdrive effect, fundamentally changing your final drive ratio and enabling pinion gear reduction strategies that simply aren't possible with stock transmission components.
- 5-6 Tooth Pinion Equivalent Reduction — By effectively adding 5-6 teeth to your pinion gear equivalent, this gear set allows you to achieve optimal motor RPM management and thermal performance without physically changing your pinion, giving you more flexibility in your tuning approach.
- Extended High-Speed Gearing Range — The overdrive system increases your upper range of gearing options far beyond what standard high-speed gears provide, making this component essential for anyone serious about maximising top-end performance with modern low KV brushless motors.
- Aftermarket Low KV Motor Optimisation — This gear set is specifically designed to work harmoniously with aftermarket low KV motors, unlocking performance that simply cannot be achieved with factory transmission components, making it an essential upgrade for competitive builders and speed enthusiasts.
- Premium Traxxas Engineering — As an official Traxxas component, every gear is manufactured to exacting standards with precision tolerances, ensuring smooth meshing, minimal backlash, and reliable performance even under the extreme conditions that come with high-speed RC driving.
- Advanced Driver Component — This is specialist equipment for experienced pilots; the gear set requires proper knowledge of how to adjust your motor pinion, spur gear, tyre size, and complete power system to work correctly, making it ideal for serious tuners and competitive RC enthusiasts.
Technical Performance
The Traxxas Gear Set (overdrive) TRX7886 represents a fundamental shift in how you approach transmission tuning for your X-Maxx or XRT vehicle. The combination of the 24-tooth input gear and 47-tooth output gear creates a ratio that, whilst sounding technical, translates into real-world performance benefits: lower motor stress, improved thermal management, and the ability to run your brushless motor at its optimal RPM range even when pushing for higher top speeds. This gear set makes a significant change to your final drive ratio, something that Traxxas engineers have carefully calculated to be equivalent to adding 5-6 teeth to your pinion gear. For drivers running aftermarket low KV motors—such as those in the 1200-2000 KV range—this overdrive setup enables performance that would be impossible with stock transmission components. The precision engineering throughout ensures smooth gear meshing with minimal backlash, critical for reliable operation when you're running high-power brushless systems. However, it's crucial to understand that this is not a drop-in replacement for casual drivers: successful implementation requires adjusting your motor pinion diameter, spur gear selection, potentially your tyre size, and ensuring your complete power system is properly matched. Advanced drivers with experience tuning large radio-controlled vehicles will appreciate the engineering excellence and the performance flexibility this gear set provides, whilst beginners should note that improper installation or setup will result in poor performance or drivetrain damage.
What's in the Box
- Traxxas Overdrive Gear Set comprising the 24-tooth input gear and 47-tooth output gear assembly
What You Need to Complete
- Proper motor pinion adjustment for your specific aftermarket low KV motor
- Spur gear selection matched to your desired top speed and acceleration characteristics
- Tyre size optimisation (may require adjustment from your current setup)
- Power system review to ensure your ESC and battery can safely handle the new gearing
- Professional installation or advanced mechanical knowledge of X-Maxx/XRT transmission systems
- Understanding of how final drive ratios affect motor temperature and performance
Frequently Asked Questions
- Is the Traxxas Gear Set overdrive suitable for beginners or stock vehicles? — No, this gear set is explicitly intended for advanced drivers only with previous experience and knowledge of large radio-controlled vehicles capable of high speed and acceleration. It is not suitable for use on a stock vehicle without making proper adjustments to your motor pinion, spur gear, tyre size, and complete power system. Beginners should master the basics with stock components before considering this advanced upgrade.
- What vehicles is this overdrive gear set compatible with? — The Traxxas Gear Set (overdrive) TRX7886 is designed for Traxxas X-Maxx and XRT models, including the X-Maxx Belted 4WD Brushless RTR 8S Monster Truck, X-Maxx Ultimate models, X-Monster Chassis, and XRT VXL-8S and XRT Ultimate variants in all available colour options.
- How much does this gear set increase top speed? — The overdrive effect, equivalent to adding 5-6 teeth to your pinion gear, increases your upper range of gearing options significantly. The actual top speed increase depends on your specific aftermarket motor KV, spur gear selection, and tyre diameter. With low KV motors, you can achieve substantially higher speeds than would be possible with stock transmission gears, but this requires careful tuning of all drivetrain components.
- Can I use this with my stock motor and batteries? — This is not recommended. The overdrive gear set is specifically designed for aftermarket low KV motors. Using it with stock components will result in either poor performance or excessive motor stress. You need to properly adjust your entire power system, including motor selection, pinion size, and potentially battery upgrade, to get the best results from this gear set.
- What does this gear set actually change about my vehicle's performance? — By making a significant change to your final drive ratio through the 24-tooth input and 47-tooth output gear combination, this gear set effectively adds 5-6 teeth to your pinion gear equivalent. This allows you to run a smaller physical pinion, which reduces motor stress, improves thermal characteristics, and enables higher top speeds when paired with the right low KV motor and properly selected spur gear.
- Do I need professional installation? — Whilst experienced builders comfortable with X-Maxx and XRT transmission systems can install this themselves, the setup process requires understanding of how to properly adjust your motor pinion, select the correct spur gear, and potentially modify your tyre size. Professional installation or at minimum consultation with an experienced RC technician is strongly recommended to ensure proper meshing, correct ratio selection, and safe performance.
- What makes this different from simply changing my pinion gear? — Rather than physically changing your pinion gear size, which has limitations, the overdrive gear set provides the equivalent effect of a 5-6 tooth pinion reduction whilst using a complete transmission assembly. This approach is engineered specifically for reliability and performance with the X-Maxx and XRT platforms, and it unlocks gearing flexibility that pinion-only changes cannot achieve.
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 Gear Set (overdrive) TRX7886 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: TRX7886
- Product Type: Transmission Gear Set
- Input Gear: 24-tooth
- Output Gear: 47-tooth
- Gear Set Type: Overdrive
- Final Drive Ratio Change: Equivalent to adding 5-6 teeth to pinion gear
- Compatibility: X-Maxx Belted 4WD Brushless RTR 8S Monster Truck (Orange, Blue, Red, Green variants), X-Maxx Ultimate (Blue X, Green X variants), X-Monster Chassis, XRT VXL-8S (Green, Black, Blue, Orange variants), XRT Ultimate (Blue X, Green X variants)
- Intended Use: Advanced drivers only with previous experience
- Motor Type: Designed for aftermarket low KV motors
- Tuning Requirements: Requires adjustment to motor pinion, spur gear, tyre size, and power system
- EAN Code: 020334788603
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