Overview
The VITAVON HD Steel 18mm Pivot Ball M8x25mm is a premium upgrade component designed specifically for Arrma Kraton 8S and Outcast 8S RC vehicles. This pack contains two replacement pivot balls, making it ideal for hobbyists and serious RC enthusiasts in the UK who demand superior durability and performance from their 1/8 scale electric RC cars. Whether you're a weekend basher pushing your RC buggy to the limit or a dedicated competitor looking to upgrade your Arrma truck's suspension geometry, these hardened steel pivot balls deliver the reliability and strength you need for extended run times and aggressive driving conditions.
Manufactured by VITAVON, a recognised brand for high-quality RC upgrades, these pivot balls represent a significant step up from stock components. Built from 45# steel with precision hardened treatment, they are engineered to withstand the extreme stresses and impacts that come with high-speed running, jumping and rock crawling. If you've experienced premature wear on your stock pivot balls or noticed play developing in your suspension linkage, switching to these VITAVON HD components will restore crisp, responsive handling and extend the service life of your RC vehicle's suspension system.
For UK RC enthusiasts running ready to run RC cars or custom-built setups, this upgrade addresses one of the most common wear points in 1/8 scale electric buggies and short course trucks. The M8x25mm specification ensures perfect fitment with genuine Arrma parts, and the two-piece pack means you have both left and right replacements ready to install, minimising downtime and keeping your RC hobby on track.
Key Features
- 45# Steel Construction with Hardened Treatment — These pivot balls are manufactured from robust 45# steel and subjected to a proprietary hardening process, making them significantly stronger and more durable than the stock Arrma components they replace. The hardened surface resists wear and deformation, ensuring smooth operation even under extreme suspension loads.
- Designed for 1/8 Scale Arrma Models — Engineered with precision tolerances, these pivot balls are compatible with Arrma Kraton 8S and Arrma Outcast 8S platforms, fitting perfectly into the existing suspension geometry without modification or adjustment. This ensures plug-and-play installation for anyone familiar with basic RC maintenance.
- Sold as a Pair (2pcs) — This pack includes both left and right pivot balls needed for a complete suspension upgrade, eliminating the need to purchase multiple individual components. Having a complete matched pair ensures balanced handling characteristics across both sides of your RC vehicle.
- Direct Upgrade from Stock Part Number ARA330560 — These VITAVON HD components are a direct replacement for the original Arrma ARA330560 pivot balls, meaning fitment is guaranteed and no adaptation or modification is required. Simply remove the worn stock parts and install the upgraded VITAVON versions.
- Enhanced Durability for Extended Service Life — The hardened steel construction significantly extends the lifespan of your suspension components compared to softer stock alternatives, reducing the frequency of replacement and lowering your long-term maintenance costs for your RC buggy or short course truck.
- Improved Suspension Response — By upgrading to harder, more durable pivot balls, you eliminate play and slop in your suspension linkage, resulting in crisper steering response, better suspension articulation, and more predictable handling during high-speed running and aggressive cornering.
Technical Performance
The VITAVON HD Steel 18mm Pivot Ball is engineered with precision manufacturing standards that meet the demands of serious RC enthusiasts. The 18mm pivot ball diameter paired with the M8x25mm specification ensures compatibility with the Arrma Kraton 8S and Outcast 8S suspension geometry, which are renowned for their aggressive performance capabilities in both high-speed bashing and technical rock crawling scenarios. The 45# steel material is specifically chosen for its balance of hardness and impact resistance—softer than some tool steels but harder and more durable than standard mild steel used in stock components. The hardening treatment applied during manufacturing creates a surface layer that resists micro-fracturing and wear, extending the service interval significantly compared to untreated steel. For 1/8 scale electric RC vehicles pulling sustained speeds and hitting substantial jumps, suspension wear is inevitable, but upgrading to hardened steel pivot balls dramatically reduces the rate at which this wear occurs. The precision-ground construction ensures that tolerance stackup is minimised, maintaining clean suspension geometry and crisp handling characteristics throughout the life of the component. Installation is straightforward for anyone with basic RC maintenance knowledge, typically requiring only an appropriate hex key or ball joint tool, making this an accessible upgrade for UK RC hobbyists of all experience levels.
What's in the Box
- 2x VITAVON HD Steel 18mm Pivot Ball M8x25mm components
Frequently Asked Questions
- Are these pivot balls compatible with my Arrma Kraton 8S or Outcast 8S? — Yes, these VITAVON HD Steel pivot balls are specifically engineered for Arrma Kraton 8S and Arrma Outcast 8S models as direct replacements for the original ARA330560 stock parts. The M8x25mm specification and 18mm ball diameter ensure perfect fitment with no modification required.
- How much stronger are these compared to stock pivot balls? — The VITAVON HD components are manufactured from 45# steel with hardened treatment, making them considerably stronger and more durable than the stock components supplied with your Arrma vehicle. The hardening process creates a wear-resistant surface that extends service life significantly, particularly beneficial for UK RC enthusiasts running in demanding conditions.
- Will these upgrade parts improve my RC car's handling? — Yes, by eliminating wear and play in your suspension linkage, these hardened steel pivot balls provide crisper steering response and more predictable handling characteristics. If your vehicle has developed looseness or vague suspension feel over time, upgrading to fresh VITAVON HD pivot balls will restore responsive, precise control.
- How difficult is it to install these pivot balls? — Installation is straightforward and requires only basic tools and RC maintenance knowledge. The parts are direct replacements for stock components, so no modification or alignment adjustment is needed. Most UK RC enthusiasts can complete the installation in under 15 minutes per side.
- Why should I upgrade from stock to VITAVON HD components? — Stock pivot balls wear relatively quickly under the stresses of high-speed running and aggressive driving. Upgrading to hardened steel components from VITAVON significantly extends service life, reduces maintenance frequency, and improves suspension response and handling precision, making it a worthwhile investment for serious RC hobbyists.
- Are these suitable for both bashing and racing applications? — Absolutely. Whether you're running your RC buggy in casual weekend bashing sessions or competing in organised RC racing events, these hardened steel pivot balls provide the durability and performance required for consistent, reliable operation across all driving styles.
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 VITAVON HD Steel 18mm Pivot Ball M8x25mm For Arrma Kraton 8S Outcast 8s,Sells As 2pcs - Vitavon Black VITARA330560 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.
- Product Type: Pivot Ball
- Brand: VITAVON
- Model Number (SKU): K8S0117
- Retail Model Number: VITARA330560
- Stock Part Number: ARA330560
- Material: 45# Steel with hardened treatment
- Pivot Ball Diameter: 18mm
- Specification: M8x25mm
- Colour: Black
- Quantity in Pack: 2 pieces
- Compatible Vehicle Type: Buggy, Crawler, Drift Car, Scale, Short Course Truck
- Compatible Fuel Type: Electric
- Compatible Scale: 1/8
- Compatible Models: Arrma Kraton 8S (ARA110002BT1 / ARA110002BT2), Arrma Outcast 8S (ARA5810B / ARA5210B)
- Condition: New
- Country of Manufacture: China
- Bundle Listing: No
- Custom Bundle: No
- Modified Item: No
- Shipping Method: DHL/UPS shipping available
- Shipping Time: 3-10 business days
- Handling Time: Ships within 3 business days after receiving cleared payment
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.
