- Brand: Losi
- Model Number: Z-LOSA99031
- EAN: 605482484890
- Product Type: Servo Arm / Servo Horn
- Material: Aluminium
- Servo Spline Fitment: 23-tooth
- Configuration: Fixed (not servo saver)
- Compatibility: Losi KO Air JR, KO, AIR platforms; compatible with Sanwa servos and other 23T servo motors
Overview
The Losi KO Air JR Aluminium Servo Arm (Z-LOSA99031) is a premium replacement servo horn designed specifically for RC enthusiasts running Losi KO Air JR platforms and compatible systems. This high-quality aluminium servo arm is an essential upgrade for anyone serious about improving their RC car's steering response and reliability. Whether you're a dedicated racer pushing your 1/10 scale RC buggy to the limit, or a weekend basher looking to enhance your RC car UK setup, this servo arm delivers the durability and precision that matters when every steering input counts.
Manufactured by Losi, a globally recognised leader in RC vehicle engineering and components, this servo arm combines lightweight aluminium construction with robust design principles. It's engineered to work seamlessly with 23-tooth servo splines, making it compatible with a range of standard RC servo systems including Sanwa servo options. The fixed servo saver configuration means this arm is ideal for drivers who prefer direct, responsive steering without the compliance of a servo saver, or for setups where a fixed connection is the preferred engineering choice.
As an RC car UK enthusiast, you'll appreciate that this is genuine Losi product, built to exacting standards and designed to work flawlessly with your existing KO Air JR platform. The aluminium construction provides an excellent balance between weight savings and structural integrity, helping to maintain responsive steering inputs without unnecessary mass. Available now at RC Model Shop, this servo arm is a direct replacement or upgrade component that will transform your RC vehicle's steering performance.
Key Features
- Aluminium Construction — Manufactured from lightweight yet durable aluminium alloy, this servo arm reduces unsprung weight in your RC car's steering system whilst maintaining the structural rigidity needed for precise control during high-speed manoeuvres and aggressive cornering.
- 23-Tooth Servo Spline Fitment — Designed specifically to fit 23-tooth servo splines, this servo horn is compatible with a wide range of standard RC servo motors, including popular Sanwa servo units used throughout the RC hobby community.
- Fixed Configuration — This servo arm features a fixed mounting design rather than a servo saver configuration, delivering direct steering response without any give or compliance in the drivetrain, perfect for drivers who demand immediate feedback from their steering inputs.
- Losi Brand Quality — As an official Losi component, this servo arm meets the same engineering standards as OEM Losi parts, ensuring perfect fitment and long-term reliability when used on KO Air JR and compatible RC platforms.
- Direct Replacement Part — Whether you're replacing a worn or damaged servo arm or upgrading from a standard plastic horn, this aluminium option is a straightforward bolt-in replacement that requires no modification to your existing RC car setup.
Technical Performance
The Losi KO Air JR Aluminium Servo Arm represents a significant upgrade in steering system performance and longevity. Built from high-grade aluminium alloy, this component offers superior durability compared to standard plastic servo horns, resisting bending and cracking even during intense RC racing sessions or aggressive bashing. The 23-tooth spline design ensures a secure, wobble-free connection to compatible servo motors, maintaining steering accuracy lap after lap. The fixed configuration eliminates any potential play or movement in the servo saver mechanism, translating every input from your RC radio transmitter directly into steering action on your RC car. This direct connection is particularly valued by competitive racers and serious enthusiasts who demand the most responsive steering feel. The lightweight aluminium construction helps minimise unsprung weight in your RC vehicle's front end, contributing to improved handling characteristics and quicker steering response times. Whether you're running a brushless 1/10 scale buggy or exploring the competitive world of RC racing in the UK, this servo arm delivers the precision and reliability that separates good RC cars from great ones. The engineering quality reflects Losi's reputation as a manufacturer of professional-grade RC components, making this an investment in your RC car's long-term performance.
What's in the Box
- 1x Losi KO Air JR Aluminium Servo Arm (Z-LOSA99031)
Frequently Asked Questions
- What RC cars is this Losi servo arm compatible with? — This servo arm is designed for the Losi KO Air JR platform and any other RC vehicles that use 23-tooth servo splines. It is compatible with standard RC servo motors from manufacturers such as Sanwa, making it a versatile upgrade for many 1/10 scale RC buggies and similar platforms. Check your vehicle's servo specifications to confirm 23-tooth spline fitment before ordering.
- Is this servo arm suitable for beginners? — Yes, this component is suitable for RC enthusiasts of all skill levels. Beginners will benefit from the improved durability and steering response compared to standard plastic servo arms, whilst experienced racers will appreciate the precision and reliability that this aluminium component provides. Installation is straightforward, requiring only basic tools and mechanical knowledge.
- What is the difference between this fixed servo arm and a servo saver design? — The fixed configuration on this servo arm means it connects directly to your servo motor without any compliance or give. This provides immediate, responsive steering feedback and is preferred by racers who want direct control over their RC car's direction changes. A servo saver would allow some movement to protect the servo during impacts, making it better suited for aggressive bashing. Choose fixed configuration if you prioritise steering response; choose a servo saver if you want servo protection.
- Will this work on my existing Losi RC car? — This servo arm is engineered specifically for Losi KO Air JR platforms. If your RC car uses a 23-tooth servo spline, it should be compatible. Confirm your servo horn spline count (usually printed on the component or listed in your RC car's manual) before purchasing to ensure proper fitment.
- What servo motor do I need for this servo arm? — Any standard RC servo motor with a 23-tooth spline output shaft will work with this servo arm. Popular choices include Sanwa servo units and other mainstream RC servo brands. The servo arm itself is passive and works with any compatible servo; your choice of servo motor will determine torque, speed, and overall steering performance.
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 Servo Arm, Aluminum: KO/AIR/SPM Z-LOSA99031 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.
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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.
