- Manufacturer: Losi
- Part Number: Z-LOS263001
- EAN: 0605482170779
- Tune-Up Type: Suspension
- Product Type: Rear Shock Spring Set
- Scale: 1/4
- Included Spring Rates: Soft, Medium, Hard
- Compatible Models: Losi 1/4 Promoto-MX Motorcycle RTR FXR, Losi 1/4 Promoto-MX Motorcycle RTR Pro Circuit, Losi 1/4 Promoto-MX Motorcycle RTR Club MX, Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR
Overview
The Losi Rear Shock Spring Set for Promoto-MX and Promoto-SM motorcycles is an essential tuning component for serious RC enthusiasts looking to optimise their bike's suspension performance. Whether you're running the iconic 1/4 scale Promoto-MX or the versatile Promoto-SM supermoto, this spring set gives you the flexibility to dial in your suspension setup for different track conditions, riding styles and terrain types. Fine-tuning your RC motorcycle's suspension is crucial for achieving the perfect balance between traction, stability and comfort, and having multiple spring options in one set makes it easy to experiment and find your ideal setup without needing to purchase multiple separate products.
This is a genuine Losi OEM part that delivers the quality and precision engineering you expect from the manufacturer. The Rear Shock Spring Set is designed specifically for the Promoto-MX and Promoto-SM platforms, ensuring perfect fitment and compatibility. For RC car UK enthusiasts and motorcycle lovers, having the right suspension tuning options can make the difference between a good run and a winning performance. Whether you're preparing for competitive racing or simply want to enhance your weekend bashing sessions, these suspension springs are a worthwhile investment in your RC motorcycle's performance.
Suspension tuning is one of the most effective ways to unlock your motorcycle's true potential, and this three-spring set gives you the tools to do exactly that. From softer springs for smooth, flowing tracks to stiffer springs for technical, choppy surfaces, you'll have all the options you need to stay competitive and keep your Promoto-MX or Promoto-SM performing at its best.
Key Features
- Three Spring Options in One Set — This package includes a soft, medium, and hard shock spring, giving you multiple tuning options without needing to buy separate parts. Having three different spring rates allows you to quickly adapt to changing track conditions and find the exact suspension feel that works best for your riding style and the terrain you're running on.
- Genuine Losi OEM Component — These are authentic manufacturer parts engineered specifically for the Promoto-MX and Promoto-SM motorcycles. Using genuine OEM springs ensures precise fit, reliable performance and longevity compared to aftermarket alternatives, giving you confidence that you're using components designed by the engineers who know these bikes best.
- Enhanced Suspension Tuning Control — Spring rate selection is fundamental to suspension performance, affecting how the shock absorbs bumps, maintains traction and handles weight transfer during cornering. With multiple spring rates to choose from, you can fine-tune your bike's handling characteristics to suit your preferences and driving technique.
- Easy Installation and Swapping — Changing between different spring rates is straightforward and requires no special tools or expertise. This makes it simple to experiment with different setups between heats, practice sessions or racing events to find the configuration that gives you the best performance and confidence in your bike.
- Compatible with Multiple Promoto Variants — Whether you own the Promoto-MX FXR, Promoto-MX Pro Circuit, Promoto-MX Club MX, or any Promoto-SM variant, this spring set is designed to work seamlessly with all current Promoto models. This universal compatibility across the range makes it a smart choice for riders who own or plan to own multiple Promoto motorcycles.
Technical Performance
The Losi Rear Shock Spring Set represents a practical approach to suspension customisation for 1/4 scale RC motorcycles. Suspension tuning in RC motorcycles is a critical factor in overall performance, affecting how the bike's rear end responds to track irregularities, maintains traction during acceleration and handles load transfer in corners. The inclusion of three distinct spring rates—soft, medium, and hard—provides a comprehensive tuning range that allows riders to optimise performance across different track surfaces and riding conditions. Softer springs are typically preferred on smooth, flowing tracks where traction is readily available and bump absorption is important, whilst harder springs work better on rough, technical terrain where maintaining chassis control and preventing excessive suspension movement is necessary. The engineering and manufacturing standards of genuine Losi components ensure consistency in spring rates and durability under the demands of competitive RC racing and recreational use. These springs are engineered to work perfectly with the Promoto-MX and Promoto-SM rear shock assemblies, providing reliable damping characteristics and long-term performance.
What's in the Box
- 1 x Soft Shock Spring
- 1 x Medium Shock Spring
- 1 x Hard Shock Spring
Frequently Asked Questions
- What Promoto models does this rear shock spring set fit? — This spring set is compatible with the Losi 1/4 Promoto-MX Motorcycle RTR in FXR trim, the Promoto-MX with Pro Circuit tuning, the Promoto-MX Club MX variant, and the Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR with battery and charger included. The springs are designed to work with all current Promoto-MX and Promoto-SM models, making this a versatile choice if you own any variant in the range.
- How do I know which spring rate to use for my track? — Spring rate selection depends on track conditions, your riding style and the specific characteristics you want from your bike. Softer springs provide better bump absorption and are generally better for smooth tracks, whilst harder springs maintain better control on rough or choppy surfaces. The best approach is to start with the medium spring and experiment with soft and hard options during practice to see which feels best for your particular track and technique.
- Are these genuine Losi parts? — Yes, these are authentic OEM Losi components manufactured to the same specifications and quality standards as the parts that come stock on new Promoto models. Using genuine manufacturer parts ensures perfect compatibility, reliable performance and the durability you need for competitive racing and regular recreational use.
- Do I need any special tools to change the springs? — Spring changes are relatively straightforward and don't require specialised tools. You'll need basic RC tools like a hex key set that you likely already have if you're maintaining your Promoto. If you're unfamiliar with the process, Losi documentation and online guides from the RC community provide step-by-step instructions for safely swapping springs.
- How often should I change my spring rates? — You should change springs whenever track conditions change significantly or when you want to experiment with different handling characteristics. Many competitive racers test different spring rates between heats to optimise their setup, whilst casual users might swap springs seasonally or when switching between different riding locations.
- What is the difference between soft, medium and hard springs? — Soft springs compress more easily and absorb bumps better, making them ideal for smooth tracks where comfort and traction matter. Medium springs offer a balanced approach suitable for general riding. Hard springs resist compression more, maintaining better control on rough terrain and preventing excessive suspension travel during aggressive riding or on choppy tracks.
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 Rear Shock Spring Set: Promoto-MX/SM Z-LOS263001 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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