- Brand: Losi
- Model Number: LOS-2287
- Product Type: Lean Bar Spring Set
- Application: Losi Promoto-SM, Losi Promoto-MX
- Material: Steel
- Spring Rates Included: 2.3mm, 2.5mm, 2.7mm
- Quantity: 6 springs total (2 springs of each rate)
- Vehicle Type: Motorcycle
- Spare Part Category: Suspension
- Compatible Models: C-LOS-2310 Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR, C-LOS-2272 Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR Basic
- EAN: 0660132629243
Overview
The Losi Lean Bar Spring Set is an essential suspension upgrade for owners of the Losi Promoto-SM and Promoto-MX supermoto motorcycles. These high-quality steel lean bar springs are engineered to enhance the performance and handling characteristics of your RC motorcycle, making them an ideal choice for anyone looking to optimise their Losi 1/4 scale bike. Whether you are a seasoned RC enthusiast or new to the world of RC motorcycles in the UK, this suspension upgrade offers straightforward installation and immediate performance benefits that will elevate your riding experience.
Lean bar springs are crucial suspension components in motorcycle RC models, directly affecting how your bike handles cornering, acceleration and deceleration. By offering three different spring rates in one comprehensive set, Losi has designed this product to give you the flexibility to fine-tune your Promoto-SM or Promoto-MX to match your specific riding style and track conditions. This is the kind of performance-focused upgrade that serious RC motorcycle racers and enthusiasts demand from their equipment.
RC Model Shop stocks genuine Losi parts and accessories, and this lean bar spring set represents the quality and reliability you can expect from this respected manufacturer. Available now with UK delivery, this is a must-have spare part for anyone serious about getting the absolute best out of their Losi supermoto motorcycle.
Key Features
- Three Spring Rate Options — This set includes lean bar springs in three different stiffness ratings: 2.3mm, 2.5mm and 2.7mm, giving you the ability to dial in the perfect suspension setup for your specific riding preferences and track conditions without needing to purchase multiple sets.
- High-Quality Steel Construction — These springs are manufactured from premium steel, ensuring durability and consistent performance through repeated use and demanding riding sessions, so you can trust them to hold up to the rigours of competitive and recreational RC riding.
- Genuine Losi Component — As an official Losi part, this spring set is engineered to exact specifications and integrates seamlessly with your Promoto-SM or Promoto-MX, guaranteeing compatibility and optimal performance without any fitment issues.
- Easy Installation — These springs are straightforward to install, requiring no special tools or modifications, making this an accessible upgrade even for those new to RC motorcycle maintenance and tuning.
- Dual Model Compatibility — The set works with both the Losi Promoto-SM and Promoto-MX models, making it a versatile upgrade option if you own either of these supermoto motorcycles.
- Performance Tuning — By adjusting your lean bar spring rate, you can fine-tune how your motorcycle responds during cornering, improving handling characteristics and overall ride quality across different track layouts.
Technical Performance
The Losi Lean Bar Spring Set delivers the engineering excellence that Losi is renowned for in the competitive RC motorcycle market. These springs are manufactured from premium steel, chosen specifically for its ability to maintain consistent spring rates through extended use whilst resisting fatigue and wear. The inclusion of three distinct spring rates—2.3mm, 2.5mm and 2.7mm—allows riders to experiment and optimise their suspension geometry based on track conditions, riding style and personal preference. Stiffer springs (2.7mm) offer more responsive handling and better support during aggressive cornering, whilst softer springs (2.3mm) provide a more compliant ride that absorbs bumps and imperfections more effectively. The middle option (2.5mm) serves as an excellent baseline for balanced performance. When integrated into the suspension system of your Promoto-SM or Promoto-MX, these lean bar springs directly influence how your motorcycle's body leans during cornering, affecting traction, stability and overall control. This level of suspension tuning capability is what separates casual RC riders from those who are serious about maximising their model's performance on the track.
What's in the Box
- 2 x 2.7mm Lean Bar Springs
- 2 x 2.5mm Lean Bar Springs
- 2 x 2.3mm Lean Bar Springs
Frequently Asked Questions
- What is the difference between 2.3mm, 2.5mm and 2.7mm lean bar springs? — The numbers refer to the diameter of the spring wire, which determines the stiffness of the spring. The 2.7mm springs are the stiffest and provide more support during cornering, the 2.5mm springs offer a middle ground for balanced performance, and the 2.3mm springs are the softest, providing a more compliant suspension that absorbs bumps more effectively. By having all three rates in one set, you can experiment to find the perfect setup for your riding style and track conditions.
- Will these springs fit my Losi motorcycle? — Yes, this set is designed specifically for the Losi Promoto-SM and Promoto-MX supermoto motorcycles and will fit without any modification or fitment issues. These are genuine Losi components engineered to work perfectly with these models.
- How often should I replace lean bar springs? — Lean bar springs are durable components and typically last a very long time with normal use. You should inspect them regularly for damage or permanent deformation, and replace them if you notice they no longer return to their original shape or if they have visible cracks.
- Can I mix and match different spring rates? — Yes, many RC riders experiment with mixing spring rates on the front and rear lean bars to achieve different handling characteristics. For example, you might use a stiffer spring on one side and a softer spring on the other to adjust how your motorcycle handles.
- Is this suitable for beginners? — Absolutely. Whilst suspension tuning is an advanced topic, this spring set is easy to install and the included instructions are straightforward. Even beginners can benefit from having these options available as they learn more about how suspension affects their riding experience.
- What tools do I need to install these springs? — Installation is straightforward and typically requires only basic tools that most RC enthusiasts already have. No special or expensive equipment is needed to swap lean bar springs on your Promoto-SM or Promoto-MX.
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 LOS Lean Bar Spring Set, 2.3, 2.5, 2.7mm: Promoto-MX/SM Z-LOS-2287 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.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- 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.
