Traxxas Foam Inserts 3.0 Inch Soft RC Tyre Inserts Pack of 2 TRX9879

Overview

The Traxxas Foam Inserts, 3.0in (soft) (2) TRX9879 are essential replacement components for RC enthusiasts who demand the best performance from their radio-controlled vehicles. Whether you're a seasoned competitor running a high-performance RC buggy, a weekend basher enjoying off-road adventures, or someone new to the RC hobby in the UK, quality foam inserts are crucial for maintaining grip, comfort and consistent handling. These soft foam inserts are specifically designed to work with 3.0-inch tyres, providing the perfect balance between cushioning and performance that serious RC drivers rely on.

Traxxas is globally recognised as a leader in RC innovation and engineering excellence, and their foam insert technology reflects decades of refinement in the sport. The soft compound in these inserts absorbs impact effectively, reducing vibration transmitted through the chassis and improving overall ride quality on rough terrain. For RC car UK buyers looking for genuine Traxxas components, these foam inserts represent excellent value and compatibility with a wide range of Traxxas models. Having the right foam inserts fitted to your tyres can make a significant difference to how your RC car performs, handles and feels during driving sessions.

This pack contains two foam inserts, which is the standard quantity needed for a pair of tyres on most RC vehicles. Foam inserts are a consumable item in the RC hobby — they gradually compress and wear with use — so keeping spare sets available ensures you're always ready for the next session without downtime. Whether you're replacing worn inserts or setting up a new set of tyres, the Traxxas Foam Inserts, 3.0in (soft) are the genuine choice trusted by RC drivers across the UK.

Key Features

• Soft Compound Formula — The soft foam construction is engineered to absorb impacts and vibrations effectively, which means your RC car will have a smoother, more controlled feel over uneven terrain and obstacles, translating to better handling and driver control during competitive or recreational driving sessions.
• 3.0-Inch Size Compatibility — These inserts are specifically manufactured to fit 3.0-inch tyres precisely, ensuring perfect fitment and optimal performance without gaps or misalignment that could compromise your vehicle's handling characteristics.
• Pack of Two — The pack includes two foam inserts, which is the correct quantity for fitting one pair of tyres on your RC vehicle, keeping your setup complete and balanced across both wheels.
• Genuine Traxxas Component — As an authorised Traxxas product, these foam inserts are manufactured to the exact specifications and quality standards that Traxxas is famous for, guaranteeing compatibility and performance across their entire vehicle range.
• Impact Absorption Technology — The foam material is designed to compress gradually under load, dissipating energy from impacts with obstacles, jumps and rough ground, which reduces stress on your chassis and extends the life of your tyres and vehicle components.
• Vibration Reduction — By cushioning the tyre against the rim and chassis, these inserts significantly reduce the vibration that travels through the vehicle during high-speed running, which improves comfort during extended driving sessions and can enhance precision in handling.
• Affordable Consumable Replacement — Foam inserts are a wear item in RC hobby use, and at an accessible price point, you can keep spare sets ready without significant expense, ensuring you're never stuck without the right equipment for your next RC session.

Technical Performance

The Traxxas Foam Inserts, 3.0in (soft) represent the result of extensive engineering and real-world testing by Traxxas engineers and professional RC drivers. The soft foam compound is formulated to provide the ideal balance between cushioning and support — too hard and the tyre bounces excessively; too soft and the tyre loses stability and responsiveness. These inserts work by fitting inside the tyre, between the rubber and the wheel rim, creating a suspension effect that improves traction and handling on various surfaces. The foam gradually compresses under the weight of the vehicle and the forces generated during acceleration, cornering and braking, then rebounds to absorb impacts from jumps and rough terrain. The 3.0-inch size is a standard dimension across many Traxxas RC vehicle models, from short-course trucks to buggies and bashers. The soft rating makes these inserts particularly suitable for loose surfaces like sand or gravel, and for drivers who prioritise comfort and control over raw speed. Performance with foam inserts is highly dependent on correct fitment and proper maintenance — the inserts should be inspected regularly for compression and replaced when they no longer provide adequate cushioning, typically after several months of regular use in the RC hobby.

What's in the Box

• Foam Inserts, 3.0-inch (soft) — Quantity: 2

Frequently Asked Questions

• What is the difference between soft, medium and firm foam inserts? — Foam inserts are available in different hardness ratings to suit different driving conditions and preferences. Soft inserts provide maximum cushioning and vibration reduction, making them ideal for rough terrain, loose surfaces and recreational driving where comfort is prioritised. Medium inserts offer a balanced approach, and firm inserts provide minimal cushioning but maximum responsiveness and speed. For most RC car UK users, soft inserts are the most versatile choice, especially if you're driving on mixed terrain or prioritising smooth handling.
• How often do foam inserts need to be replaced? — The lifespan of foam inserts depends on how frequently you use your RC vehicle and the surfaces you drive on. With regular weekly use on rough terrain, most drivers find that foam inserts need replacement every 2-4 months. Signs that replacement is needed include visible compression marks that don't rebound, a noticeably softer or harsher ride feel, and reduced traction. Having spare sets available, like this two-insert pack, means you can swap them quickly without disrupting your RC driving schedule.
• Are these foam inserts compatible with all Traxxas vehicles? — The 3.0-inch size is compatible with all Traxxas models that use 3.0-inch tyres, which includes many popular vehicles in the Traxxas range. However, before purchasing, you should verify that your specific Traxxas RC model uses 3.0-inch tyres, as some larger vehicles use 4.0-inch or 2.2-inch sizes. Check your vehicle manual or the Traxxas website to confirm your tyre size before ordering.
• What surfaces are these inserts best suited to? — The soft foam compound is particularly effective on loose, uneven terrain such as sand, dirt tracks, gravel, and natural outdoor environments where impact absorption is highly beneficial. They also work well for indoor carpet track driving where the softer compound helps maintain traction and comfort. On smooth surfaces like sealed roads, medium or firm inserts might provide better performance, but soft inserts will still work adequately.
• Can I use foam inserts with any tyre brand? — Foam inserts are designed to fit inside tyres based on tyre size rather than brand. As long as your tyres are 3.0 inches in diameter, these Traxxas foam inserts should fit correctly regardless of whether your tyres are Traxxas, Duratrax or other compatible brands. However, fit quality is best with genuine Traxxas tyres, so pairing these inserts with Traxxas 3.0-inch tyres is recommended for optimal performance.
• Is this suitable for beginners? — Absolutely. Foam inserts are essential for all RC drivers, from complete beginners to advanced competitors. If you've just purchased your first ready-to-run RC car in the UK and it came with foam inserts, having spare replacement inserts ensures you can continue enjoying your hobby without interruption. They require no special installation skills — simply remove the worn inserts and insert the new ones into your tyres before fitting them back onto your wheels.
• What is the part number and how do I identify this product? — The model number for this product is TRX9879. You'll see this number on the packaging and in product listings. The EAN code is 020334026057. When ordering replacement foam inserts, always check that you're getting the TRX9879 to ensure you receive the correct 3.0-inch soft compound version.

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 Traxxas Foam Inserts, 3.0in (soft) (2) TRX9879 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.