Key Features
- Perfect fit every time — CNC Machined for consistent and accurate tolerances
- High Strength — Made with 7075 T6 Aluminum
- Secure, flex-resistant connection
- Great looks — Black anodized aluminum
- Fits 15T spline servos
Overview
New Dynamite large scale servo arms are machined from high quality 7075 T6 aluminum material to withstand the high demand of giant scale RC surface applications.
Overview
The DYN Alum TL Sx Arm 15T Spline is a premium replacement servo arm engineered for the Losi 5IVE-T, 5IVE-B, and WRC large scale RC vehicles. Whether you're a seasoned RC competitor, a weekend basher, or exploring the world of 1/5-scale RC trucks for the first time, this CNC-machined aluminium servo arm delivers the precision, durability and reliability that serious RC enthusiasts demand. As a crucial component in your steering and throttle linkage system, the quality of your servo arm directly impacts handling response, durability under stress, and overall performance on the track or bash spot.
Dynamite, a trusted name in large scale RC components across the UK and beyond, has engineered this servo arm to withstand the extreme forces generated by 1/5-scale vehicles. Whether you're replacing a worn or damaged arm or upgrading your setup with higher-quality components, this arm represents an investment in consistent, predictable RC driving dynamics. Servo arms are often overlooked, but they are fundamental to translating your transmitter inputs into precise vehicle movement.
Built from high-strength 7075 T6 aluminium and finished in professional black anodising, this servo arm combines lightweight construction with exceptional durability. The 15T spline connection ensures secure fitment to compatible large scale servos, eliminating the flex and play that can develop in plastic alternatives. If you own a Losi 5IVE-T, 5IVE-B, or WRC and want to maintain peak performance, this replacement arm is an essential spare to keep on hand.
Key Features
- CNC Machined from 7075 T6 Aluminium — Precision engineering ensures consistent and accurate tolerances across every arm, eliminating variation that might otherwise affect steering response or throttle control. The high-grade 7075 T6 material is a premium aerospace-grade aluminium alloy renowned for its excellent strength-to-weight ratio, making it ideal for withstanding the high demand of giant scale RC surface applications without adding unnecessary weight to your servo system.
- 15T Spline Connection — The 15-tooth spline shaft fits Losi 5IVE-T, 5IVE-B, and WRC models perfectly, delivering a secure and flex-resistant connection that prevents wobbling or slipping during aggressive steering inputs or throttle commands. This secure fitment is critical for maintaining predictable handling response.
- High Strength and Flex-Resistant — Unlike plastic servo arms that can bend or flex under load, the aluminium construction resists deformation even during hard cornering, high-speed runs, or aggressive bashing. This structural integrity translates directly into sharper steering feedback and more responsive vehicle control.
- Black Anodised Finish — The durable black anodising not only looks professional and finished, but also provides corrosion resistance and protection against UV degradation, extending the lifespan of your servo arm in outdoor RC environments and maintaining its appearance through countless hours of driving.
- Direct Replacement for Losi Large Scale Models — Engineered specifically for the Losi 5IVE-T, 5IVE-B, and WRC platforms, this arm is a drop-in replacement that requires no modification or adaptation, making it an ideal spare for your spares box or a straightforward upgrade path.
Technical Performance
The DYN Alum TL Sx Arm 15T Spline represents the pinnacle of servo arm engineering for 1/5-scale RC vehicles. Constructed from 7075 T6 aluminium—an aerospace-grade material prized for its exceptional strength-to-weight characteristics—this arm is built to endure the rigorous demands of large scale RC driving. Unlike standard plastic servo arms that gradually flex and fatigue under repeated stress, the aluminium construction maintains its structural integrity through hundreds of hours of driving. The CNC machining process ensures that every arm produced meets tight tolerances, eliminating the variations in fit and function that can accumulate across multiple replacement parts. The 15T spline connection provides a secure interface with compatible Losi servos, preventing the play and slippage that develops in looser connections and directly improving steering responsiveness and throttle control precision. The black anodised finish provides dual benefits: a professional appearance that looks great on your completed vehicle, and genuine corrosion resistance that protects the aluminium against moisture, salt spray, and UV exposure. For RC enthusiasts running their vehicles regularly in the UK's variable weather conditions, this protective finish is invaluable. The arm is lightweight relative to its strength, meaning it does not significantly increase the mass of your servo system or affect your vehicle's handling balance. Whether you're replacing a damaged arm on a track-used vehicle or building a custom setup, this component delivers the precision engineering and durability that separates reliable RC equipment from budget alternatives.
What's in the Box
- 1x DYN Alum TL Sx Arm 15T Spline (machined aluminium, black anodised)
What You Need to Complete
- Compatible Losi 5IVE-T, 5IVE-B, or WRC servo with 15T spline shaft
- Standard servo hardware and fasteners (typically already on your vehicle)
Frequently Asked Questions
- What models does this servo arm fit? — This arm is specifically engineered for the Losi 5IVE-T, 5IVE-B, and WRC large scale RC vehicles. The 15T spline connection is compatible with servos designed for these platforms. Before ordering, verify that your servo uses a 15T spline connection; consult your manual or contact our knowledgeable team if you are unsure of your model revision or servo specification.
- Why choose aluminium over plastic servo arms? — Aluminium servo arms deliver three critical advantages: superior flex resistance (plastic arms can bend under hard cornering or aggressive inputs), extended lifespan (aluminium resists fatigue cracking), and better precision (CNC machining ensures consistent tolerances that plastic moulding cannot match). For any RC enthusiast serious about reliability and performance, aluminium is the smart upgrade.
- Is this a direct replacement for the standard Losi arm? — Yes, this arm is a drop-in replacement designed specifically for Losi 5IVE-T, 5IVE-B, and WRC models. No modification or adaptation is needed; simply remove your existing arm and fit this new one using your existing servo hardware. It is an ideal component to keep as a spare for your RC car UK setup.
- What makes 7075 T6 aluminium special? — 7075 T6 is aerospace-grade aluminium chosen for its exceptional strength-to-weight ratio. It offers significantly higher strength than standard 6061 aluminium, making it capable of withstanding the extreme loads generated by large scale RC vehicles without bending or deforming. The T6 heat treatment further enhances its durability and fatigue resistance.
- Does the black anodising protect against rust and corrosion? — Yes, the black anodised finish provides a protective oxide layer that resists corrosion from moisture, salt water, and UV light exposure. This is particularly valuable for RC vehicles run in the UK's outdoor conditions, where weather resistance extends component lifespan significantly.
- Can I use this arm on other Losi models? — This arm is specifically designed for the Losi 5IVE-T, 5IVE-B, and WRC platforms and features the 15T spline connection these models require. Other Losi vehicles or brands may use different spline sizes or mounting standards, so compatibility is not guaranteed. Always verify your servo spline specification before purchasing.
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 DYN Alum TL Sx Arm 15T Spline: Losi 5iveT, 5iveB, WRC P-DYNR0110 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.
