Overview
The Fastrax Blue Aluminium Short Servo Arm W/Inserts for 23/24/25 Spline (FAST37B) is an essential upgrade component for RC enthusiasts across the UK who demand precision engineering and reliable performance from their servo systems. This premium aluminium servo arm is specifically designed to work with a wide range of popular RC models, making it an ideal replacement or upgrade part for anyone looking to enhance their RC car or truck's steering response and durability. Whether you're piloting a crawler, basher, or competition-grade RC vehicle, this servo horn delivers the quality and compatibility you need to keep your RC hobby running smoothly.
Crafted from high-grade aluminium, this short servo arm combines lightweight construction with exceptional strength, ensuring your RC model maintains precise steering control even during aggressive driving sessions. The blue anodised finish not only looks sharp on your RC car or truck, but also provides a protective coating that resists corrosion and wear. For RC enthusiasts in the UK who take their hobby seriously, investing in quality servo arms like this one is a smart choice that pays dividends in reliability and performance over time.
This servo arm is engineered to accept standard 23, 24, and 25-spline servo inputs, making it compatible with an enormous range of RC platforms and setups. The inclusion of precision inserts ensures a secure, wobble-free connection to your servo, which is critical for maintaining accurate steering geometry and responsiveness during races or casual drives. RC model shop customers appreciate this part because it represents genuine OEM-quality engineering at an accessible price point.
Key Features
- Premium Aluminium Construction — Manufactured from high-grade aluminium, this servo arm delivers an excellent strength-to-weight ratio that keeps unsprung weight to a minimum while providing the durability needed for demanding RC applications. Lighter servo arms improve steering response and reduce the load on your servo motor, which means faster, more precise steering inputs and longer servo lifespan.
- Blue Anodised Finish — The vibrant blue colour is applied through an anodising process that creates a hard, corrosion-resistant surface. This protective coating shields the aluminium from oxidation, salt spray, and UV damage, ensuring your servo arm maintains its appearance and structural integrity through seasons of use in the UK climate.
- Universal 23/24/25 Spline Compatibility — This servo arm is designed to accept servo shafts with 23, 24, or 25-spline configurations, giving you exceptional compatibility across a huge range of RC models and servo types. Whether you're upgrading Traxxas, Team Losi, Team Associated, Tamiya, HPI, Mugen, Axial Racing, or other popular RC brands, you'll find this servo horn fits perfectly into your setup.
- Precision Inserts Included — The pre-installed inserts ensure a secure, precise fit on your servo shaft with zero wobble or play. These inserts are critical for maintaining accurate steering geometry and prevent the servo arm from slipping or rotating on the shaft during high-demand driving, which protects both your servo mechanism and your RC vehicle's handling characteristics.
- Short Arm Length — The short length of this servo arm provides a direct mechanical advantage for your servo motor, meaning faster steering response and quicker directional changes. This is particularly valuable in RC crawler competitions and technical driving situations where precise, responsive steering is essential for navigating obstacles and tight terrain.
- Drop-In Replacement — If your current servo arm is damaged, worn, or you simply want to upgrade, this Fastrax component serves as a direct replacement that maintains your existing servo setup without requiring additional modifications or recalibration.
Technical Performance
The Fastrax Blue Aluminium Short Servo Arm represents the kind of precision engineering that separates quality RC components from budget alternatives. Built entirely from aluminium rather than plastic or nylon, this servo horn resists flexing and maintains rigid steering geometry even under the demanding loads encountered during aggressive RC driving. The material choice is particularly important for RC enthusiasts in the UK who operate their models in variable weather conditions—aluminium's inherent corrosion resistance, combined with the protective anodising process, ensures long-term durability without degradation. The short arm configuration optimises the mechanical leverage applied to your servo motor, translating servo rotation into rapid steering input with minimal lag. This is especially valuable if you're running a servo saver system or operating in fixed-mount configurations where steering precision directly impacts vehicle handling. The 23, 24, and 25-spline compatibility means this single part can serve multiple RC platforms, making it an economical choice for collectors or bashers who operate multiple vehicles. The precision inserts are manufactured to tight tolerances, eliminating the play and flex that characterises lower-quality servo arms and ensuring your RC car or truck responds exactly as intended to your transmitter inputs. Whether you're setting up a new RC model, repairing a damaged component, or seeking to upgrade an existing vehicle, this Fastrax servo arm delivers the quality and performance that serious RC enthusiasts expect.
What's in the Box
- 1x Fastrax Blue Aluminium Short Servo Arm with Inserts for 23/24/25 Spline
Frequently Asked Questions
- What spline sizes does the Fastrax Blue Aluminium Short Servo Arm fit? — This servo arm is engineered to accept standard 23, 24, and 25-spline servo inputs, making it compatible with the vast majority of servo types used in RC cars, trucks, and crawlers available in the UK market. Whether you're using Futaba, Spektrum, Savöx, or other popular servo brands, you'll find the correct spline compatibility.
- Is this servo arm suitable for RC crawlers and rock crawling? — Yes, absolutely. The rigid aluminium construction and short arm length make this servo arm ideal for RC crawler applications where precise steering control is essential for navigating rocky terrain and obstacles. The precision inserts ensure zero play in your steering system, which is critical for technical crawling.
- Can I use this servo arm on multiple RC models? — Potentially yes, provided your various RC models use servos with 23, 24, or 25-spline shafts. The universal compatibility of this Fastrax part means it could serve as a replacement component across different platforms, making it a practical investment for anyone with multiple RC vehicles.
- What is the difference between short and long servo arms? — Short servo arms provide faster steering response with direct mechanical leverage, whilst longer arms provide greater mechanical advantage and potentially smoother, more gradual steering inputs. This short-arm design is preferred for applications requiring responsive steering and quick direction changes.
- Will this servo arm fit my servo saver or fixed-mount setup? — Yes, this servo arm is designed to work with both servo saver systems and fixed-mount configurations, giving you flexibility in how you configure your RC vehicle's steering geometry.
- How durable is the anodised finish? — The anodised aluminium finish is extremely durable and resistant to corrosion, oxidation, and UV degradation. This protective coating is especially valuable for RC enthusiasts in the UK where salt spray from winter road treatments and variable weather can damage unprotected metal components.
- Is this a genuine Fastrax component? — Yes, when purchased through RC Model Shop, this is an authentic Fastrax product with full OEM quality. Fastrax is a recognised manufacturer of quality RC replacement parts and upgrades, and their servo arms are widely respected in the RC community.
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 Short Servo Arm W/Inserts for 23/24/25 Spline FAST37B 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: FAST37B
- Product Type: Aluminium Servo Arm
- Colour: Blue
- Material: Aluminium
- Finish: Anodised
- Arm Length: Short
- Servo Spline Compatibility: 23, 24, 25-spline
- Inserts: Precision inserts included
- Mounting Style: Multi servo saver or fixed
- Available Colours: Blue, Gold, Purple, Red
- EAN: 5055323903083
- Stock Status: In stock
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.
