Overview
The Losi Front Brake Caliper, V2, Assembled is a premium upgrade component designed specifically for the Losi 1/4 scale Promoto-SM FXR Supermoto Motorcycle. This is a direct replacement brake caliper that brings enhanced stopping power and reliability to your RC motorcycle. Whether you're a dedicated RC enthusiast looking to improve your model's performance or someone seeking to maintain their Losi Promoto-SM in peak condition, this brake caliper delivers professional-grade braking capabilities. The V2 designation indicates this is an upgraded version, featuring modern engineering improvements over earlier iterations. For anyone serious about RC motorcycles in the UK, investing in quality brake components like this is essential for safe, controlled riding experiences.
Braking performance is absolutely critical in RC motorcycle racing and recreational riding alike. The Losi Front Brake Caliper, V2 represents genuine Losi engineering, manufactured to OEM specifications to ensure perfect compatibility and reliability with your Promoto-SM. This assembled unit comes fully prepared and ready to install, featuring all the essential components needed for immediate use. The caliper utilises an injection-moulded plastic construction for the main body, which provides the ideal balance between weight savings and durability. This is particularly important in 1/4 scale RC motorcycles where every gram counts towards handling and speed performance.
RC Model Shop stocks genuine Losi spare parts and upgrades for serious hobby enthusiasts across the UK. If you own a Losi Promoto-SM or are planning to build one, having access to quality OEM replacement components ensures your model maintains factory performance standards. This brake caliper is an investment in longevity and safety for your RC motorcycle hobby.
Key Features
- 3D Printed Metal Brake Piston — The brake piston is manufactured using advanced 3D printing technology with metal materials, delivering superior durability and consistent braking force compared to traditional plastic pistons, which ensures reliable stopping performance every single time you use your RC motorcycle.
- Injection Moulded Plastic Caliper Body — The main caliper housing is precision injection-moulded from high-quality plastic that provides the perfect strength-to-weight ratio, keeping your RC motorcycle lightweight whilst maintaining the structural integrity needed for repeated braking cycles.
- Pre-Installed Bearings — This brake caliper comes with bearings already installed and pre-fitted, eliminating the need for complex assembly work and ensuring smooth caliper operation with minimal friction and wear over extended use.
- Factory-Fitted Brake Pads — The caliper includes genuine Losi brake pads already installed, which means you can fit this component and start riding immediately without needing to source additional pads separately.
- Complete Actuation System Included — The package includes a brake actuator arm and return spring, providing everything needed to connect the caliper to your motorcycle's braking system for immediate functionality.
- Direct Fit for Promoto-SM — This is a purpose-designed component engineered specifically for the Losi Promoto-SM FXR supermoto motorcycle, guaranteeing perfect fitment and optimal performance without modifications.
- V2 Upgraded Design — The V2 designation indicates this is an improved second-generation design, incorporating refinements and enhancements over the original version for better reliability and braking response.
Technical Performance
The Losi Front Brake Caliper, V2 represents genuine engineering excellence tailored specifically for 1/4 scale RC motorcycle applications. The combination of an injection-moulded plastic caliper body with a 3D printed metal brake piston delivers optimal performance characteristics for this class of vehicle. The plastic construction keeps weight to an absolute minimum, which is critical in RC motorcycles where reduced unsprung mass directly translates to improved handling, acceleration, and overall rideability. The metal brake piston, manufactured using advanced 3D printing technology, provides superior hardness and resistance to wear compared to plastic alternatives, ensuring consistent braking force throughout the lifespan of the component. The pre-installed bearings enable smooth caliper movement with minimal friction, which means your braking system responds instantly without lag or hesitation. The factory-installed brake pads are genuine Losi parts matched to this caliper's specifications, guaranteeing proper friction characteristics and braking modulation. The included brake actuator arm and return spring complete the actuation system, allowing direct connection to your motorcycle's throttle and braking controls. This is a fully assembled unit ready for installation, eliminating the frustration of complex assembly procedures and ensuring everything works correctly from day one. For UK RC motorcycle enthusiasts, this represents a genuine OEM quality component that maintains your Promoto-SM's factory performance standards and reliability.
What's in the Box
- 1x Fully Assembled Front Brake Caliper with integrated piston, pre-installed bearings, and factory-fitted brake pads
- 1x Brake Actuator Arm
- 1x Brake Actuator Return Spring
- 1x M2.5 x 10mm Cheese Head Screw
Frequently Asked Questions
- Which Losi Promoto models is this brake caliper compatible with? — This V2 brake caliper is designed as a direct upgrade for the Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR and the Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR Basic. It may also be compatible with other Promoto-SM variants, and we recommend checking with our team if you're uncertain about fitment for your specific model.
- Is this brake caliper easy to install? — Yes, this component is supplied fully assembled and ready to fit. The included brake actuator arm and return spring connect to your motorcycle's braking system, and you simply need to secure it with the supplied M2.5 x 10mm cheese head screw. Installation should take just a few minutes if you're familiar with basic RC motorcycle maintenance.
- How often will I need to replace the brake pads? — Brake pad wear depends entirely on how frequently and aggressively you use your RC motorcycle. The factory-fitted pads are genuine Losi components designed to last through normal recreational riding. If you race your Promoto-SM intensively, you may need replacement pads sooner. We stock genuine Losi brake pad kits separately.
- What is the difference between the V2 and earlier versions? — The V2 designation indicates this is an improved second-generation design incorporating refinements over the original caliper. The exact engineering enhancements focus on reliability and braking response consistency, making this the recommended choice for all current Promoto-SM builds and upgrades.
- Can I use this on other RC motorcycle brands? — This caliper is engineered specifically for the Losi Promoto-SM platform and fits directly without modification. We cannot recommend use on other brands' motorcycles, as fitment and compatibility may not be guaranteed. Always check compatibility before purchasing spare parts for different manufacturers.
- Is this suitable for beginners? — Yes, this is an OEM quality component suitable for riders of all skill levels. The pre-assembly and complete functionality means even beginners can install and use this brake caliper without requiring advanced mechanical knowledge or special tools.
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 Front Brake Caliper, V2, Assembled: PM-SM/MX Z-LOS-2290 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.
