Overview
The Fastrax Blue Aluminium Double Servo Arm W/Inserts for 23/24/25 Spline (FAST38B) is a premium quality servo horn designed for RC enthusiasts across the UK who demand reliability and precision in their radio-controlled vehicles. Whether you're piloting an RC crawler, an off-road buggy, or any RC car UK that requires responsive steering and suspension control, this servo arm delivers the performance characteristics needed for both weekend bashing and competitive racing. Built from high-grade blue anodised aluminium, this component represents excellent value for money and is an essential upgrade or replacement part for any serious RC hobbyist looking to enhance their vehicle's handling and durability.
This servo horn is specifically engineered to fit servo splines of 23, 24, and 25mm specifications, making it compatible with a wide range of popular RC vehicles and servo brands. The inclusion of metal inserts provides additional strength and longevity, ensuring that your servo arm can withstand the demanding conditions of off-road RC driving, high-speed bashing, and precision steering applications. For RC car enthusiasts in the UK seeking a reliable, aftermarket servo component that offers both aesthetic appeal through its striking blue anodised finish and functional excellence, the Fastrax FAST38B is an outstanding choice that punches well above its price point.
Fastrax has built a reputation for delivering quality RC components that balance affordability with durability, and this servo arm is no exception. Its double-arm design provides excellent leverage and control response, making it ideal for users who want to maximise the performance of their RC vehicles without breaking the bank. Whether you're replacing a worn servo arm on an existing RC setup or building a custom ready to run RC car from scratch, the Fastrax Blue Aluminium Double Servo Arm is a component you can trust to perform reliably in the field.
Key Features
- Premium Aluminium Construction — Manufactured from high-quality aluminium alloy and finished in a striking blue anodised colour, this servo arm provides an excellent balance between weight savings and structural strength, ensuring your RC vehicle responds accurately to steering inputs without adding unnecessary mass to your setup.
- Integrated Metal Inserts — The inclusion of metal inserts reinforces the connection points where the servo arm attaches to your servo, significantly extending the component's lifespan and preventing stripping or damage during aggressive driving or high-load steering applications.
- Universal Spline Compatibility — Designed to fit 23, 24, and 25 spline servo outputs, this double servo arm works with a vast range of RC servos commonly used in crawlers, buggies, trucks, and other RC vehicles, making it a versatile addition to any RC hobbyist's spares collection.
- Double-Arm Design — The dual-arm configuration offers superior leverage and control response compared to single-arm alternatives, translating to more precise steering inputs and improved vehicle handling dynamics during both casual driving and competitive RC racing.
- Durable Blue Anodised Finish — Beyond its visual appeal, the blue anodised surface provides enhanced corrosion resistance and protection against wear, ensuring your servo arm maintains its appearance and functionality even after extended use in challenging outdoor conditions.
- Fixed Mounting Configuration — This servo horn is designed for fixed installation on your servo, providing a stable, permanent connection that eliminates slop or movement in your steering linkage and delivers consistent handling throughout your RC driving sessions.
Technical Performance
The Fastrax Blue Aluminium Double Servo Arm represents a carefully engineered servo component built to exacting standards using premium materials. The aluminium alloy construction provides an optimal strength-to-weight ratio, crucial for RC applications where unnecessary mass directly impacts acceleration, braking performance, and battery runtime on your ready to run RC vehicle. The blue anodised finish is not merely cosmetic—it provides a hard, protective oxide layer that resists corrosion, abrasion, and the harsh elements encountered during outdoor RC driving sessions across the UK. The metal inserts serve a critical functional role, reinforcing the spline connection points and preventing the wear that typically occurs when plastic-only servo arms are subjected to repeated steering inputs, suspension articulation loads, and the shock loads inherent in off-road RC driving. With compatibility across 23, 24, and 25 spline configurations, this servo arm accommodates a broad spectrum of RC servos from various manufacturers, making it an excellent choice whether you're upgrading a Traxxas RC car, an ARRMA RC vehicle, a Losi model, or any other popular RC brand available through RC retailers in the UK. The fixed mounting design eliminates the play that can develop with removable horn systems, translating directly into improved steering precision and more responsive vehicle control during both casual bashing and competitive racing scenarios.
What's in the Box
- Fastrax Blue Aluminium Double Servo Arm with Metal Inserts
Frequently Asked Questions
- What servo spline sizes does the Fastrax FAST38B fit? — This servo arm is designed to fit servo splines of 23mm, 24mm, and 25mm diameter, covering the vast majority of servo brands used in modern RC vehicles including popular options from leading manufacturers like Spektrum, Futaba, and other respected RC servo producers.
- Why would I need to replace my existing servo arm? — Servo arms can crack, strip, or become damaged through heavy use, aggressive driving, impacts, or simply through wear and tear over time. Upgrading to a higher-quality component like this Fastrax double arm with metal inserts can prevent future damage and improve your steering response and handling characteristics.
- Is this suitable for crawlers and rock crawling? — Yes, absolutely. The robust aluminium construction combined with metal inserts makes this servo arm ideal for RC crawlers and rock crawling applications where precision steering control and durability under load are essential. The double-arm design provides excellent leverage for articulation control.
- What is the difference between a double-arm and single-arm servo horn? — Double-arm servo horns like this model provide superior leverage and steering control response compared to single-arm alternatives, allowing for finer steering adjustments and improved handling precision. The dual arms also distribute loads more evenly across the servo shaft.
- Will this improve my RC car's steering? — If you're replacing a damaged or worn servo arm, this Fastrax component should restore your vehicle to optimal steering performance. The metal inserts and quality construction eliminate play in the steering linkage, resulting in more direct and responsive control input translation.
- Is this a genuine Fastrax product? — Yes, RC Model Shop stocks only genuine, authorised Fastrax products. You can purchase with confidence knowing you're receiving an authentic component that carries the full backing of Fastrax's quality standards and design specifications.
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 Fastrax Blue Aluminium Double Servo Arm W/Inserts for 23/24/25 Spline FAST38B 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.
- Brand: Fastrax
- Model Number: FAST38B
- Product Type: Double Servo Arm Horn
- Material: Aluminium alloy
- Colour: Blue anodised
- Spline Compatibility: 23mm, 24mm, 25mm spline
- Features: Metal inserts for reinforced durability
- Mounting Type: Fixed installation
- Arm Configuration: Double-arm design
- Application: Compatible with multi-servo systems for RC vehicles
- EAN Code: 5055323903120
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.
