Overview
The Losi Rear Swing Arm is an essential replacement suspension component for your 1/4 scale Losi Promoto-MX and Promoto-SM motorcycle models. Whether you are an experienced RC enthusiast or new to the world of RC motorcycles, having quality spare parts on hand ensures your machine stays in peak condition and ready for action. This complete rear swing arm assembly is manufactured by Losi, a recognised leader in RC innovation, and is engineered to deliver the same performance and durability as the original component fitted to your motorcycle RTR.
If you own a Losi Promoto-MX or Promoto-SM RC motorcycle, the rear swing arm is a critical suspension element that absorbs impacts, maintains traction, and keeps your bike stable through corners and over rough terrain. Over time, through normal wear and tear or after an accident, you may need to replace this component to restore your RC motorcycle to full working order. This is a genuine Losi spare part, not a counterfeit or inferior copy, which means you can trust its quality and compatibility.
RC Model Shop stocks this replacement part for customers across the UK who demand authentic, factory-original components for their RC vehicles. Whether you are bashing on the track, practising tricks, or competing at events, having the correct replacement parts available means less downtime and more fun with your RC hobby.
Key Features
- Complete Assembly — This is a fully assembled rear swing arm unit, meaning you receive the complete suspension component ready to install on your Promoto-MX or Promoto-SM without requiring additional assembly or sub-components to be sourced separately.
- Genuine Losi Manufacturing — Manufactured by Losi to the same exacting standards as the original equipment, this swing arm maintains the precise geometry and tolerances required for reliable suspension performance and handling characteristics on your motorcycle model.
- OEM Replacement Part — As an original equipment manufacturer part, this swing arm is designed specifically for the Losi 1/4 scale Promoto range and ensures perfect fitment with no modifications or adaptations required during installation.
- Durable Construction — Built to withstand the rigours of RC motorcycle riding, including jumps, landings, cornering forces and general off-road abuse, this component is engineered for longevity and repeated use.
- Suspension Performance — The swing arm is a fundamental element of your motorcycle's suspension geometry, directly influencing how the rear tyre maintains contact with the ground, how the bike handles in corners, and how effectively impacts are absorbed.
Technical Performance
The rear swing arm is a critical chassis component on any RC motorcycle, and the Losi Promoto-MX and Promoto-SM models benefit from Losi's engineering expertise in suspension design. This assembly forms part of the rear suspension system and works in conjunction with your motorcycle's shock absorber to control vertical wheel movement, maintain chassis attitude, and distribute weight transfer during acceleration, braking and cornering. The swing arm's geometry directly affects the bike's handling characteristics, ground clearance, and how effectively the rear tyre stays planted on the track surface. By replacing a damaged or worn swing arm with this genuine Losi component, you ensure that your motorcycle's suspension geometry remains true to factory specifications, preserving the intended handling balance and performance characteristics. The durable construction of this assembly means it can handle the demands of regular RC motorcycle use, from gentle practice sessions to aggressive racing and freestyle tricks. Whether your Promoto-MX or Promoto-SM is finished in FXR red, Club MX blue, or any other colour variant, this swing arm is compatible with all versions of these popular 1/4 scale motorcycle models.
What's in the Box
- Complete Losi Rear Swing Arm Assembly for Promoto-MX/SM
Compatible Models
- Losi 1/4 Promoto-MX Motorcycle RTR - FXR (Red) — Part Number C-LOS06000T1
- Losi 1/4 Promoto-MX Motorcycle RTR with Battery and Charger, Pro Circuit — Part Number C-LOS06002
- Losi 1/4 Promoto-MX Motorcycle RTR - Club MX (Blue) — Part Number C-LOS06000T2
- Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR (Battery and Charger Included) — Part Number C-LOS-2310
- Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR Basic — Part Number C-LOS-2272
Frequently Asked Questions
- Is this rear swing arm compatible with all Promoto-MX and Promoto-SM models? — Yes, this genuine Losi rear swing arm assembly is engineered to fit all variants of the Promoto-MX and Promoto-SM range, including the FXR models in red and the Club MX model in blue, as well as the supermoto variants. You simply need to match it to your specific motorcycle model using the compatible part numbers listed.
- How do I know if I need to replace my rear swing arm? — If you have crashed your RC motorcycle, experienced handling changes, noticed excessive play or movement in the rear suspension, or if the swing arm is visibly bent or cracked, it is time to replace it. A damaged swing arm will negatively impact your motorcycle's handling, traction and overall performance.
- Will this part work straight out of the box? — This is a complete assembly, so it arrives ready to install. However, you will need basic RC tools such as hex keys and possibly a small screwdriver to remove your damaged swing arm and install the replacement. The installation process is straightforward for anyone with experience maintaining RC vehicles.
- What is the difference between the Promoto-MX and Promoto-SM models? — The Promoto-MX is a motocross-style motorcycle, whilst the Promoto-SM is a supermoto variant with a different chassis design. This rear swing arm is compatible with both models, though the fitting points and suspension geometry differ slightly between them.
- Why should I buy a genuine Losi part instead of a cheaper aftermarket alternative? — Genuine Losi parts are engineered to original factory specifications, ensuring perfect fitment, correct suspension geometry, and reliable performance. Aftermarket parts may not fit correctly or provide the same durability, potentially leading to poor handling or premature failure. Investing in authentic components protects your RC motorcycle investment.
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 Swing Arm: Promoto-MX/SM Z-LOS264000 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.
