Overview
The Losi Steer Shaft Sealed Bearing Set is an essential replacement component designed specifically for Losi's popular 1/4 scale Promoto-MX and Promoto-SM motorcycle RTR models. If you own either of these high-performance RC motorcycles, maintaining critical components like the steer shaft bearings is vital to ensuring smooth, responsive steering and prolonged chassis longevity. This sealed bearing set represents genuine Losi engineering, providing the precision and durability that RC enthusiasts across the UK demand from their hobby equipment. Whether you're a seasoned RC car UK competitor or someone who enjoys casual weekend bashing, having the correct replacement parts on hand means minimal downtime and maximum enjoyment of your Losi motorcycle.
Sealed bearings are crucial because they protect the internal race and ball components from dirt, moisture and debris that accumulate during outdoor use. The steer shaft is responsible for translating your transmitter's steering input into precise directional control, making it one of the most important mechanical systems in your RC motorcycle. Over time, with regular use, even sealed bearings can wear and require replacement. The Losi Steer Shaft Sealed Bearing Set ensures you can restore your steering to factory specifications, maintaining the responsive handling and precision that made you choose Losi in the first place.
This genuine Losi component carries the part number Z-LOS267003 and is compatible with multiple variants of the Promoto-MX and Promoto-SM range, making it a versatile replacement for owners of different models within this product line. When you purchase from RC Model Shop, you're investing in authentic Losi parts with the backing of an authorised UK retailer who understands the importance of genuine components for optimal RC performance.
Key Features
- Sealed Bearing Design — The sealed construction protects the internal bearing surfaces from water, dust and dirt that naturally accumulate during outdoor RC use, ensuring the steer shaft operates smoothly even after exposure to challenging conditions that would quickly damage unsealed bearings.
- Genuine Losi Component — Manufactured to precise OEM specifications by Losi, these bearings guarantee compatibility and performance matching the factory standards your Promoto-MX or Promoto-SM motorcycle was engineered to deliver.
- Multi-Model Compatibility — This bearing set fits across multiple variants of the Promoto range, including the FXR, Pro Circuit, Club MX and Supermoto versions, making it a practical spare part to keep in your maintenance kit regardless of which Promoto model you own.
- Essential Steering Component — The steer shaft is fundamental to precise directional control, and replacing worn bearings restores the responsive handling that keeps your RC motorcycle predictable and fun to drive across various terrain types.
- Easy Maintenance Part — As a bearing replacement set, this component enables straightforward maintenance without requiring specialist skills, allowing you to keep your RC motorcycle performing at its best between more extensive service intervals.
Technical Performance
The Losi Steer Shaft Sealed Bearing Set represents the precision engineering standard that Losi applies to all genuine components. Sealed bearings are manufactured using hardened steel races and premium ball elements, designed to withstand the rotational forces and directional changes that occur during RC motorcycle operation. The sealed design is particularly important because the steer shaft endures constant input from your radio control system, translating servo movement into precise steering angles. Over time, friction and exposure to environmental contaminants can degrade unsealed bearing surfaces, resulting in notchy or unresponsive steering. By replacing worn bearings with this genuine Losi set, you restore the smooth, immediate steering response that maintains your motorcycle's handling predictability. The sealed construction ensures that moisture from wet grass, rain or muddy conditions cannot penetrate to the bearing races, significantly extending the operational lifespan of this critical component compared to open bearings. This is particularly valuable for UK RC enthusiasts who often operate their models in variable weather conditions. The bearings are precision-manufactured to exacting tolerances, meaning they fit securely within the steer shaft assembly without excessive play or binding, maintaining the geometric accuracy essential for consistent steering performance across all speed ranges and manoeuvre types.
What's in the Box
- Losi Steer Shaft Sealed Bearing Set for Promoto-MX and Promoto-SM models
Frequently Asked Questions
- Is this sealed bearing set compatible with my Promoto model? — This bearing set is compatible with the Losi 1/4 Promoto-MX Motorcycle RTR in both FXR (Red) and Club MX (Blue) variants, as well as the Promoto-MX with Battery and Charger in Pro Circuit configuration. It is also compatible with both the Promoto-SM FXR Supermoto models, whether the Basic or fully equipped versions. Check your model number against the compatibility list to confirm before ordering.
- How do I know when to replace the steer shaft bearings? — Signs that your bearings may need replacement include notchy or grinding sensations when steering, a loss of smooth directional response, or visible play in the steer shaft when you manually rotate it. Regular use in dirty conditions accelerates bearing wear, so many RC enthusiasts replace them proactively during seasonal maintenance.
- Why choose sealed bearings over standard open bearings? — Sealed bearings protect against water, mud and dust penetration, which is essential for maintaining performance in typical UK outdoor conditions. The protective shields keep contaminants away from the bearing surfaces, resulting in longer service life and more consistent steering feel throughout the bearing's operational period.
- Do I need any special tools to install this bearing set? — Installation typically requires basic RC maintenance tools and mechanical knowledge. If you are not confident performing bearing replacement yourself, many RC hobby shops and experienced community members can assist with installation to ensure proper fit and function.
- What is the difference between this bearing set and aftermarket alternatives? — Genuine Losi components are manufactured to the exact OEM specifications and tolerances that your motorcycle was engineered around. This ensures compatibility, performance and longevity matching the factory design, whereas some aftermarket alternatives may have slightly different dimensions or material properties that affect steering response.
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 Losi Steer Shaft Sealed Bearing Set: Promoto-MX/SM Z-LOS267003 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.
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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.
