Overview
The Traxxas Drive cup (1pc) / 2.5x10 CS (TRX8551) is an essential replacement spare part for owners of the Traxxas UDR Unlimited Desert Racer Pro-Scale 4WD RTR Short Course Truck. This precision-engineered component is specifically designed to work with the #8550 driveshaft and represents genuine Traxxas engineering at its finest. Whether you're a serious RC enthusiast in the UK looking to maintain your high-performance short course truck or a weekend basher who wants to keep spare parts on hand, this drive cup is an indispensable addition to your RC toolkit.
As a dedicated RC car UK enthusiast, you'll appreciate the importance of having quality replacement parts readily available. The Traxxas drive cup ensures that your UDR short course truck continues to perform at its peak, delivering the precision and reliability that Traxxas is renowned for. This single-piece drive cup is manufactured to exacting standards, guaranteeing perfect fitment and durability through countless hours of bashing, racing and off-road adventure. The 2.5x10 CS specification indicates the precise dimensions and specifications required for seamless integration with your existing driveshaft assembly.
Traxxas has built a reputation as one of the world's leading RC manufacturers, and their attention to detail in every component—from the largest chassis to the smallest drive cup—reflects this commitment to excellence. If you own a brushless RC short course truck from Traxxas or are considering upgrading your RC collection with one of their premium models, having genuine replacement parts like this drive cup ensures you're always ready for the next adventure.
Key Features
- Genuine Traxxas Component — This is an authentic Traxxas spare part manufactured to the highest standards, ensuring perfect compatibility and durability with your UDR short course truck. Genuine parts mean you're getting exactly what your vehicle was designed to use, not inferior third-party alternatives that may compromise performance or longevity.
- Precision Engineered Dimensions — The 2.5x10 CS specification represents precision engineering that ensures this drive cup mates perfectly with the #8550 driveshaft. The exact dimensional tolerance guarantees smooth power transmission without binding, wobble or premature wear, maintaining the efficiency of your drivetrain.
- Compatible with UDR Models — This drive cup is specifically engineered for the Traxxas UDR Unlimited Desert Racer Pro-Scale 4WD RTR Short Course Truck, including both the Fox Racing and Rigid Industries variants (TRX85086-4-FOX1 and TRX85086-4-RGD1). This dedicated compatibility ensures you're purchasing the correct component for your specific model.
- Single Replacement Unit — This package contains one drive cup, making it ideal for replacing a damaged or worn component or building up a spare parts inventory. Having multiple drive cups on hand means you can get back to the track or trail quickly without waiting for delivery.
- Essential Maintenance Component — Regular replacement of wear items like drive cups is part of responsible RC ownership. This component experiences continuous stress during operation, and regular replacement maintains the integrity of your entire drivetrain system, preventing catastrophic failures.
- Quality Assurance — Every Traxxas drive cup undergoes rigorous quality testing before leaving the factory. You can trust that this component will perform reliably in both casual recreational use and competitive racing environments.
Technical Performance
The Traxxas drive cup (TRX8551) represents the pinnacle of drivetrain engineering for short course truck applications. Constructed with precision-machined materials, this component is engineered to transmit power smoothly from your brushless motor system through the driveshaft to the wheels with minimal energy loss. The 2.5x10 CS specification ensures perfect dimensional accuracy for use exclusively with the #8550 driveshaft, a critical compatibility requirement that prevents mechanical issues and ensures optimal performance. The drive cup plays a vital role in the overall drivetrain efficiency of your RC short course truck, and using genuine Traxxas components ensures that power delivery remains consistent and reliable whether you're running casual weekend bashing sessions or pushing your vehicle to its limits in competitive racing. The robust construction means this component can withstand the demanding forces generated by high-powered brushless motors and aggressive driving styles characteristic of modern 4WD short course truck racing. Whether you're operating in dusty desert conditions or muddy outdoor terrain, the precision engineering of this Traxxas drive cup ensures durability and consistent performance.
What's in the Box
- 1x Traxxas Drive Cup 2.5x10 CS (TRX8551)
What You Need to Complete
- #8550 Driveshaft (required for installation — this drive cup is designed exclusively for use with this specific driveshaft component)
- Traxxas UDR Unlimited Desert Racer or compatible model to install the drive cup into
Frequently Asked Questions
- Which Traxxas models does this drive cup fit? — This drive cup is specifically designed for the Traxxas UDR Unlimited Desert Racer Pro-Scale 4WD RTR Short Course Truck. It is compatible with both the Fox Racing variant (TRX85086-4-FOX1) and the Rigid Industries variant (TRX85086-4-RGD1). Always verify your model number before purchasing replacement parts to ensure compatibility.
- What is the #8550 driveshaft requirement? — This drive cup is engineered to work exclusively with the Traxxas #8550 driveshaft. The 2.5x10 CS specification indicates the precise dimensional tolerance required for this specific driveshaft. Do not attempt to use this drive cup with other driveshaft models, as it may not fit properly and could cause drivetrain damage or failure.
- When should I replace my drive cup? — Drive cups should be inspected regularly for signs of wear, cracks, or damage. If you notice grinding sounds from your drivetrain, experience difficulty engaging the driveshaft, or see visible damage to the drive cup, replacement is necessary. Many RC enthusiasts keep spare drive cups on hand for quick track repairs, especially in competitive racing environments where downtime means missing races.
- How do I know if my drive cup is damaged? — Signs of a worn or damaged drive cup include grinding or clicking sounds when the motor is running, difficulty removing or inserting the driveshaft, visible cracks or stress marks on the component, or a loss of power transmission efficiency. If you suspect your drive cup is damaged, inspect it under good light and compare it to a new unit.
- Is this suitable for beginners? — This is a replacement spare part rather than a complete vehicle or beginner-friendly kit. You should have basic mechanical knowledge of RC truck assembly and disassembly to install this component. If you're new to RC and unsure about installation, we recommend consulting the official Traxxas manual or seeking assistance from experienced RC enthusiasts.
- Can I use this with other Traxxas short course trucks? — No, this drive cup is specifically engineered for the UDR Unlimited Desert Racer model. Other Traxxas short course trucks may use different driveshaft specifications and drive cup dimensions. Always verify your exact model number and consult the official Traxxas parts diagram before ordering replacement components.
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 Drive cup (1pc) / 2.5x10 CS (use only with #8550 driveshaft) TRX8551 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: TRX8551
- EAN: 020334855107
- Product Type: Drive Cup spare part
- Spare Part Category: Drivetrain component
- Specification: 2.5x10 CS
- Driveshaft Compatibility: #8550 driveshaft only
- Quantity: 1 piece
- Compatible Vehicle Models: Traxxas UDR Unlimited Desert Racer Pro-Scale 4WD RTR Short Course Truck
- Compatible Variants: TRX85086-4-FOX1 (Fox Racing), TRX85086-4-RGD1 (Rigid Industries)
- Vehicle Type: Short Course Truck
- Scale: 1/10
- Drive System: 4WD
- RRP: £14.75
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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- 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.
