Overview
This is a Pro-Spec Rear Aluminum Hub for Losi® Promoto-SM Rear. Engineered for enthusiasts, this Pro-Spec Aluminum wheel is designed to perform in extreme environments while taking a beating. The Pro-Spec Aluminum Hub is anodized and made from 6061 billet aluminum.
3D print this lacing fixture tool to help with spoke replacements! DOWNLOAD .STL file
PRO284802 | Pro-Spec Aluminum Rear Hub Blue: Promoto-SM
Features
- True to Scale Supermoto-Inspired Appearance
- Anodized CNC Machined 6061 Billet Aluminum Hub
- Replacement Pro-Spec Aluminum Wheel Hub
Overview
The Pro-Line 1/4 Pro-Spec Aluminium Rear Hub Blue is a precision-engineered replacement wheel hub specifically designed for the Losi Promoto-SM supermoto-style RC motorcycle. This component represents the pinnacle of performance-focused engineering from Pro-Line, a recognised leader in RC car UK and RC motorcycle aftermarket parts. Whether you're an experienced RC enthusiast looking to upgrade your Promoto-SM or a dedicated racer seeking reliability and style, this aluminium hub delivers both in abundance. The Pro-Spec range is engineered for those who demand excellence from every component of their RC setup, refusing to compromise on quality or appearance.
Built with a true supermoto-inspired aesthetic, this aluminium hub transforms your Promoto-SM into a machine that looks as serious as it performs. The distinctive anodised blue finish isn't just visually striking—it's a protective coating that shields the underlying 6061 billet aluminium from corrosion and wear. This is a hub designed to perform in extreme environments while taking a beating, making it ideal for bashers, racers, and enthusiasts alike. The engineering philosophy behind the Pro-Spec Aluminium Rear Hub prioritises durability without sacrificing the lightweight properties that aluminium naturally offers, creating a component that enhances both performance and longevity of your Promoto-SM.
If you're running a Promoto-SM with Pro-Spec Aluminium SM rear rims with spokes, this rear hub is the perfect complementary upgrade to complete your wheel setup. RC Model Shop stocks genuine Pro-Line Pro-Spec parts for UK customers, ensuring you receive authentic components backed by manufacturer warranties and our expert support team's knowledge.
Key Features
- Anodised CNC Machined 6061 Billet Aluminium Construction — This hub is manufactured from premium 6061 billet aluminium using precision CNC machining, then anodised for enhanced durability and corrosion resistance. The anodising process creates a hard, protective oxide layer that prevents oxidation and extends the component's lifespan, which is especially important for RC cars used in the UK's variable weather conditions and when exposed to moisture from damp grass and wet tracks.
- True to Scale Supermoto-Inspired Appearance — The hub's design captures the aesthetic of full-size supermoto motorcycle wheels, bringing scale realism and visual impact to your Promoto-SM. This attention to detail in appearance matters to enthusiasts who take pride in their RC motorcycle's looks as much as its performance, and the blue anodised finish adds a premium visual element that distinguishes upgraded machines from stock builds.
- Replacement Pro-Spec Aluminium Wheel Hub — Designed as a direct replacement component, this hub integrates seamlessly with the Pro-Spec Aluminium SM rear rim with spokes system. This modularity means you can upgrade individual components of your wheel setup without replacing the entire wheel assembly, saving money while allowing customisation of your setup.
- 3D Print Lacing Fixture Tool Available — Pro-Line provides a downloadable STL file for a 3D-printed lacing fixture tool that assists with spoke replacements and maintenance. This thoughtful inclusion demonstrates Pro-Line's commitment to supporting enthusiasts throughout their machine's lifespan, making spoke adjustments and replacements significantly easier and more accurate than attempting this procedure without proper tooling.
- Optimised for Promoto-SM Compatibility — This hub is engineered specifically for the Losi Promoto-SM, ensuring perfect fitment and performance. Using a component designed for your exact model rather than a generic alternative guarantees that tolerance stacking is eliminated and performance characteristics are optimised for your machine's specific chassis and geometry.
Technical Performance
The Pro-Line Pro-Spec Aluminium Rear Hub represents a significant engineering achievement in terms of material science and manufacturing precision. Constructed from 6061 billet aluminium, this material choice reflects a deep understanding of RC motorcycle dynamics and the balance required between lightweight construction and structural integrity. The 6061 alloy is renowned in engineering applications for its excellent machinability, corrosion resistance, and strength-to-weight ratio—properties that are critical in RC applications where every gram of unsprung weight affects handling and acceleration. The CNC machining process ensures dimensional accuracy that allows the hub to mate perfectly with both the Losi Promoto-SM chassis and Pro-Spec Aluminium SM rear rim with spokes, eliminating run-out issues that could cause handling problems or vibration. The anodising finish adds a protective hard-coat layer that can withstand the rigours of bashing, racing, and outdoor use in the UK's temperate climate, where exposure to moisture and temperature fluctuations could otherwise compromise bare aluminium. The supermoto-inspired design isn't merely aesthetic—the spoke pattern and hub geometry are influenced by real motorcycle engineering, translating proven real-world design principles into the 1/4 scale RC package. Performance characteristics include improved rotational inertia management compared to lighter plastic alternatives, which translates to more predictable throttle response and better power delivery characteristics, particularly important when running high-performance brushless RC motor setups on competitive Promoto-SM builds.
What's in the Box
- Pro-Line 1/4 Pro-Spec Aluminium Rear Hub (Blue anodised)
- Download link for 3D printable lacing fixture tool STL file
Frequently Asked Questions
- Will this Pro-Spec Aluminium Rear Hub fit my Losi Promoto-SM? — Yes, this hub is specifically engineered for the Losi Promoto-SM and is designed to work with Pro-Spec Aluminium SM rear rims with spokes. Verify that your Promoto-SM is equipped with Pro-Spec aluminium wheel components before purchasing, as the hub is optimised for this specific platform and may not be compatible with standard plastic stock wheels or other aftermarket wheel systems.
- What colour options are available for the Pro-Spec Aluminium Rear Hub? — This particular hub is available in blue anodised finish. The blue colour provides both aesthetic appeal and practical corrosion protection through the anodising process. If you prefer alternative colours for your Promoto-SM wheel setup, Pro-Line offers matching front hubs in different colours such as red and gold finishes across the Pro-Spec range.
- How durable is the anodised aluminium finish? — The anodised finish is a hard-coat protective layer created through electrochemical oxidation of the aluminium substrate. This process creates a surface that is significantly more scratch-resistant and corrosion-proof than bare aluminium. The finish is suitable for regular RC use in the UK, including outdoor bashings and competitive racing, and will maintain its appearance for years of use when properly maintained.
- Can I use this hub if I don't have Pro-Spec Aluminium rims? — This hub is specifically designed for compatibility with Pro-Spec Aluminium SM rear rims with spokes. Using it with other rim styles may result in fitment issues, poor handling, or potential safety concerns. To ensure optimal performance and compatibility, use this hub as part of a complete Pro-Spec aluminium wheel assembly for your Promoto-SM.
- What does the 3D printable lacing fixture tool do? — The downloadable STL file allows you to 3D print a specialised tool that assists with spoke installation, adjustment, and replacement. This tool significantly simplifies the process of maintaining or modifying your wheel's spoke configuration, making it much easier to achieve proper spoke tension and alignment without specialised equipment or expertise.
- Is this a full wheel or just the hub component? — This is the hub component only—the central rotating element that connects to your Promoto-SM's rear axle. It is designed to be used with Pro-Line Pro-Spec Aluminium SM rear rims with spokes to create a complete wheel assembly. If you need a full ready-assembled wheel, you'll want to ensure you have or purchase the matching Pro-Spec rim component.
- How does this compare to plastic stock hubs? — Aluminium hubs like this Pro-Spec component offer several advantages over plastic alternatives, including superior durability under impact, better heat dissipation for motors and bearings, improved rotational characteristics, and a premium appearance that reflects the performance-focused design philosophy. Aluminium construction resists cracking and warping better than plastic, particularly in the UK's variable climate, and maintains dimensional stability longer, supporting consistent handling over extended use periods.
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 PRO 1/4 Pro-Spec Aluminum Rear Hub Blue: Promoto-SM G-PRO284802 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.
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