Overview
The Traxxas Spider gear shaft assembly (TRX7783X) is an essential drivetrain spare part designed for the legendary Traxxas X-Maxx and XRT monster trucks and bashers. This genuine Traxxas component is engineered to maintain the precise differential performance that these high-performance RC vehicles demand. Whether you're a weekend basher pushing your X-Maxx to its limits or a serious RC competitor, having quality spare parts on hand ensures your machine stays in peak condition and ready for action.
RC enthusiasts across the UK rely on Traxxas spare parts to keep their vehicles performing at the highest level. The X-Maxx is renowned for its extreme power delivery and aggressive driving capabilities, which puts significant stress on drivetrain components over time. The spider gear shaft is a critical component within the aluminium differential carrier that manages torque distribution to the wheels. This genuine replacement part ensures your differential continues to function with the precision engineering Traxxas is recognised for, maintaining the handling characteristics and performance you expect from your vehicle.
Purchased as part of regular maintenance or after hard driving sessions, this spider gear shaft assembly keeps your RC car UK-compliant and performing as intended. The stainless steel washers and precision spacers ensure everything sits perfectly within the differential carrier, delivering the consistent, predictable performance that separates quality RC equipment from inferior alternatives.
Key Features
- Complete Spider Gear Shaft Assembly — This package includes 2 spider gear shafts, providing a full replacement or upgrade set to maintain or restore your differential's performance and reliability.
- Included Spacers and Washers — Four precision spacers and two 16x23.5x0.5mm stainless steel washers are included to ensure perfect alignment and clearance within the 7781X aluminium differential carrier, preventing premature wear and maintaining smooth operation.
- Stainless Steel Construction — The washers are manufactured from corrosion-resistant stainless steel, ensuring durability and longevity even when exposed to moisture and harsh driving conditions typical of UK off-road RC bashing.
- Genuine Traxxas OEM Part — As an official Traxxas spare part, this component meets the exact specifications and tolerances required for the X-Maxx, XRT and compatible vehicles, ensuring perfect fit and optimal performance.
- Compatible with Multiple X-Maxx and XRT Variants — This spider gear shaft assembly works with numerous Traxxas models including the X-Maxx Belted, X-Maxx Ultimate, X-Monster, and XRT Ultimate in various colours and configurations.
- Essential Maintenance Component — Regular inspection and replacement of differential spider gears is part of proper RC car UK maintenance, especially for high-powered brushless vehicles that demand reliable drivetrain performance.
Technical Performance
The spider gear shaft is a precision-engineered component that sits at the heart of the Traxxas 7781X aluminium differential carrier. This differential system is designed to distribute engine torque between the left and right wheels whilst allowing them to rotate at different speeds during cornering, a critical function for maintaining traction and control in high-performance RC driving. The aluminium differential carrier itself is engineered for strength and lightness, and the spider gear shafts must work in perfect harmony with it to prevent binding, excessive play, or premature wear. The inclusion of four spacers and two stainless steel washers in this kit ensures that each component sits in the exact correct position within the carrier, eliminating gaps and misalignment that could cause differential noise or poor handling. The 16x23.5x0.5mm dimensions of the washers are precisely calculated to match the bearing surfaces and gear geometry of the X-Maxx and XRT differential system. Stainless steel construction provides corrosion resistance, which is particularly important for UK RC enthusiasts who often drive in damp conditions or after washing their vehicles. This is a direct-fit OEM Traxxas component, meaning it requires no modification or fitment adjustments and will integrate seamlessly into your existing differential setup. For serious RC car UK owners, maintaining a stock of genuine drivetrain spares like these spider gear shafts ensures you can quickly perform repairs and get back to driving without extended downtime.
What's in the Box
- 2 x Spider gear shafts
- 4 x Spacers
- 2 x 16x23.5x0.5mm stainless steel washers
Frequently Asked Questions
- Is this spider gear shaft assembly compatible with my Traxxas X-Maxx or XRT? — Yes, this TRX7783X assembly is compatible with a wide range of X-Maxx and XRT variants, including the X-Maxx Belted 4WD, X-Maxx Ultimate, X-Monster Chassis, and XRT Ultimate and VXL-8S models. Compatibility covers multiple colour variants including Orange, Blue, Red, Green and Black. Check your vehicle's model number against the compatibility list to confirm your specific variant is supported.
- Why do I need replacement spider gear shafts? — Spider gear shafts can wear over time due to the stresses of driving, especially in high-powered brushless vehicles like the X-Maxx 8S. They may also be damaged during impacts or aggressive driving. Having spare shafts on hand ensures you can quickly restore differential function and get back to driving without waiting for repairs. Regular inspection of your differential is part of good RC car UK maintenance practice.
- What is the difference between this and other differential components? — The spider gear shaft is specifically the rotating shaft within the differential that the spider gears rotate around. This kit includes the shafts plus the necessary spacers and stainless steel washers needed for correct installation in the 7781X aluminium differential carrier. The spacers ensure correct positioning, while the washers prevent the gears from sliding along the shaft and maintain proper gear mesh.
- Can I install this myself? — Yes, these are direct-fit components designed for the DIY RC enthusiast. You will need basic tools including hex keys and an understanding of differential assembly. However, if you're unfamiliar with differential maintenance, we recommend consulting the Traxxas manual or seeking guidance from experienced RC enthusiasts before attempting installation.
- What tools will I need? — This assembly can be installed with standard RC tools including hex keys, screwdrivers and a clean work surface. You may also wish to use differential fluid or grease during reassembly, though this depends on your specific Traxxas model and maintenance routine.
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 Spider gear shaft (2 pcs) / spacers (4 pcs) / 16x23.5x.5 stainless washer (2 pcs) (for #7781X aluminium Differential carrier) TRX7783X 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.
- Product Type: Spider gear shaft assembly with spacers and washers
- Manufacturer: Traxxas
- Model Number: TRX7783X
- EAN Code: 0020334778390
- Spare Part Category: Drivetrain spares
- Components Included: 2 spider gear shafts, 4 spacers, 2 stainless steel washers
- Washer Dimensions: 16x23.5x0.5mm
- Washer Material: Stainless steel
- Compatible Differential Carrier: 7781X aluminium differential carrier
- Compatible Vehicle Models: Traxxas X-Maxx Belted 4WD Brushless RTR 8S Monster Truck (Orange, Blue, Red, Green variants), Traxxas X-Maxx Ultimate (Blue X, Green X variants), Traxxas X-Monster Chassis, Traxxas XRT Ultimate (Blue X, Green X variants), Traxxas XRT VXL-8S (Green, Black, Blue, Orange variants)
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