Overview
This is a Pro-Spec Front SM Wheel Spoke Kit. These are true-to-scale zinc-plated steel spokes for precise truing and durability on the Pro-Spec Aluminum SM Front Wheel. Replace spokes as needed with easily identifiable dots on the head of the spoke.
3D print this lacing fixture tool to help with spoke replacements! DOWNLOAD .STL file
PRO284701 | Pro-Spec Front Wheel Spoke Kit for Promoto-SM
Features
- True to Scale Supermoto-Inspired Appearance
- Zinc Plated Steel Spokes for Precise Truing and Durability
- Dot markings for easy identification ( 3 dot = Extra Short, 4 dot = Short )
- Max torque: 4 Kg/cm or 358 oz/in
- Replacement Pro-Spec Aluminum Wheel Front Spokes
Overview
The Pro-Line 1/4 Pro-Spec Front Wheel Spoke Kit for Promoto-SM is an essential replacement and upgrade component for serious RC motorcycle enthusiasts in the UK. This meticulously engineered spoke kit brings genuine scale authenticity to your supermoto-inspired RC build, featuring true-to-scale zinc-plated steel spokes that deliver both precision engineering and exceptional durability. Whether you're an experienced RC basher, a competitive racer, or discovering the world of quarter-scale RC motorcycles for the first time, this spoke kit ensures your Pro-Spec Aluminium front wheel maintains perfect symmetry and performance characteristics through countless hours of high-speed action.
Designed specifically for the Promoto-SM platform, these replacement spokes are engineered to work seamlessly with Pro-Line's Pro-Spec Aluminium front hub and rim assembly, providing you with the flexibility to maintain and customise your RC motorcycle's appearance and performance exactly as you need it. The kit addresses a critical need in the RC motorcycle community: when spokes become bent, damaged, or worn through aggressive riding, you need a reliable replacement solution that maintains the exact specifications and quality standards of the original components. RC Model Shop stocks this essential upgrade so you can keep your Promoto-SM running at peak performance.
What sets this spoke kit apart is the combination of scale authenticity, practical durability, and precision engineering. The zinc-plated steel construction isn't just about looking good—it's about ensuring your spokes can handle the stresses of real RC driving while maintaining perfect spoke tension and wheel trueness. This is the kind of component that separates a well-maintained RC motorcycle from one that gradually deteriorates through the season.
Key Features
- True-to-Scale Supermoto-Inspired Appearance — These spokes are designed to replicate the authentic look of real supermoto motorcycle wheels, bringing genuine visual realism to your 1/4 scale Promoto-SM build and making your RC motorcycle look as impressive stationary as it performs in action.
- Zinc-Plated Steel Construction — The zinc plating provides superior corrosion resistance and durability, ensuring your spokes maintain their appearance and structural integrity through extended use, whether you're racing indoors, bashing outdoors, or competing in all-weather conditions across the UK.
- Precision Truing and Durability — These spokes are engineered to support accurate wheel truing, allowing you to maintain perfect spoke tension and wheel symmetry, which directly translates to improved handling, stability, and predictable performance during high-speed runs and competitive racing.
- Easy Identification Dot Markings — Each spoke features distinctive dot markings on the head—three dots for extra-short spokes (39.75mm) and four dots for short spokes (40.75mm)—making it simple to identify the correct spoke length during installation and replacement, eliminating confusion and ensuring proper fitment.
- Replacement Spokes for Pro-Spec Aluminium Front Wheels — These spokes are specifically manufactured to fit Pro-Line's Pro-Spec Aluminium front hub and rim assembly, ensuring perfect compatibility and eliminating any guesswork when maintaining or upgrading your RC motorcycle's front wheel.
- 3D Printable Lacing Fixture Tool — Pro-Line provides a downloadable STL file for a 3D-printed lacing fixture tool, enabling DIY enthusiasts and advanced builders to perform professional-quality spoke replacements at home, saving money on service costs and giving you complete control over your RC motorcycle's maintenance.
Technical Performance
The Pro-Line 1/4 Pro-Spec Front Wheel Spoke Kit represents precision engineering at the highest level of RC motorcycle component manufacturing. The dual-spoke configuration includes 18 three-dot extra-short spokes measuring 39.75mm and 18 four-dot short spokes measuring 40.75mm, providing complete flexibility for building or rebuilding a full front wheel assembly. The zinc-plated steel material selection is critical to performance: steel provides the tensile strength necessary to support the rotational forces and impacts experienced during high-speed cornering and aggressive driving, whilst the zinc plating provides a protective layer against corrosion from moisture, salt, and road debris. The maximum torque specification of 4 kg/cm (or 358 oz/in) establishes the precise tension parameters for spoke installation, ensuring that spokes are pulled tight enough to maintain wheel trueness and structural integrity without over-tightening and causing permanent deformation or breakage. These specifications work together to create a wheel system that maintains consistent performance, predictable handling characteristics, and extended lifespan through proper maintenance and spoke replacement as needed.
What's in the Box
- 18 x Three Dot (39.75mm) Extra Short Spokes
- 18 x Four Dot (40.75mm) Short Spokes
What You Need to Complete
- Pro-Spec Aluminium Front Hub and Rim assembly (sold separately)
- Spoke tensioner or tension wrench tool
- 3D printer or access to 3D printing service (optional, for lacing fixture tool)
Frequently Asked Questions
- Can I use this spoke kit on any RC motorcycle? — No, this spoke kit is specifically engineered for the Pro-Line Promoto-SM quarter-scale RC motorcycle platform and is designed to work exclusively with the Pro-Spec Aluminium front hub and rim assembly. Using these spokes on other RC motorcycles or wheel systems will not provide proper fitment or performance.
- How do I know which spoke length to use where? — The kit includes clearly marked spokes: count the dots on the spoke head to identify which type you're using. Three-dot spokes are the extra-short 39.75mm length, whilst four-dot spokes are the short 40.75mm length. Pro-Line provides a downloadable STL file for a 3D-printed lacing fixture tool that guides proper spoke placement during installation.
- What is the proper spoke tension for my RC motorcycle? — The maximum torque specification for these spokes is 4 kg/cm or 358 oz/in. This represents the maximum safe tension—never exceed this specification, as doing so can cause spoke failure, permanent deformation of the hub flange, or cracking of the rim. It's better to slightly under-tension spokes than to risk permanent damage from over-tightening.
- Are these spokes suitable for beginners? — Spoke replacement requires some mechanical skill and precision, particularly in maintaining consistent spoke tension around the wheel. Beginners should take their time, use the 3D-printed lacing fixture tool, and consider consulting detailed build guides or video tutorials before attempting their first spoke replacement. However, experienced RC builders and mechanics will find this kit straightforward to work with.
- Why would I need replacement spokes? — During aggressive driving, crashes, or extended use, individual spokes can become bent, cracked, or develop fatigue cracks that compromise wheel trueness and structural integrity. Rather than replacing the entire wheel assembly, you can purchase this spoke kit to replace damaged individual spokes and restore your wheel to like-new condition.
- Can I purchase just the spoke length I need? — This kit includes both spoke lengths (three-dot extra-short and four-dot short spokes) because a properly laced wheel typically requires both lengths positioned at different points around the wheel. Purchasing the complete kit ensures you have all the spokes necessary for a complete wheel rebuild.
- What does zinc plating do for the spokes? — Zinc plating provides a protective layer against corrosion, extending the lifespan of the steel spokes significantly. This is particularly important if you race outdoors in wet conditions or store your RC motorcycle in humid environments across the UK. Without this protection, steel spokes would begin to rust and lose their aesthetic appeal and structural integrity.
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-Line 1/4 Pro-Spec Front Wheel Spoke Kit: Promoto-SM 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.
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.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
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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.
