Overview
The Traxxas Lower Chassis (Black) TRX3728 is an essential replacement or upgrade component for owners of Traxxas RC vehicles across the UK. This black lower chassis is engineered to provide a robust foundation for your RC car, whether you're running a Bandit, Bandit VXL, Rustler, or Rustler VXL model. As a dedicated RC retailer, we understand that having quality replacement parts on hand is crucial for maintaining peak performance and keeping your RC hobby moving forward without extended downtime.
This lower chassis stands out because of its intelligent battery compartment design, which accommodates both flat and hump-style battery packs with ease. This flexibility is invaluable for RC enthusiasts who like to experiment with different battery configurations to fine-tune their vehicle's handling characteristics and weight distribution. Whether you're a weekend basher enjoying casual off-road runs or a more serious RC car enthusiast optimising your setup for competitive performance, this chassis component delivers the reliability Traxxas is renowned for throughout the RC community in the UK and beyond.
When you choose the Traxxas Lower Chassis (Black), you're selecting a component built with precision engineering and quality materials that ensure longevity and consistent performance. The black finish complements a wide range of body colours and style preferences, making it a versatile choice for customising your ready-to-run RC car or building a competition-grade setup from the ground up.
Key Features
- 166mm Long Battery Compartment — This generous battery compartment length accommodates a wide variety of battery pack sizes and styles, giving you maximum flexibility when choosing power options for your RC vehicle. The extended length means you can experiment with different battery configurations to achieve your preferred balance between power output, weight distribution, and runtime performance.
- Compatibility with Flat and Hump-Style Battery Packs — The chassis design accepts both flat and hump-style batteries, which is a significant advantage for RC enthusiasts who want to switch between different battery types without needing multiple chassis versions. This versatility reduces your overall investment in spare parts and allows you to optimise your setup based on the type of driving you're doing on any given day.
- Designed for 3725R ESC Mounting Plate — This chassis is specifically engineered to work only with the #3725R ESC mounting plate, ensuring perfect fitment and electrical compatibility with your electronic speed controller. Using the correct mounting plate guarantees proper alignment, stable electronics mounting, and reliable power delivery to your motor throughout extended driving sessions.
- Black Colour Finish — The black colour provides an attractive, professional appearance while also offering practical benefits such as hiding dirt and wear marks during intense bashing sessions. The finish is applied to withstand the rigours of off-road driving, mud, water, and general wear that comes with active RC car usage.
- Genuine Traxxas Engineering — As an official Traxxas component, this chassis is manufactured to the same exacting standards as Traxxas factory vehicles, ensuring compatibility, durability, and performance across your entire RC setup.
Technical Performance
The Traxxas Lower Chassis (Black) represents the engineering excellence Traxxas has become famous for in the RC car hobby. Constructed from quality materials engineered to withstand the stresses of serious off-road driving, this chassis component provides the structural foundation that keeps all your vehicle systems properly aligned and positioned. The 166mm battery compartment has been precisely dimensioned to accommodate the most popular battery pack styles currently available to RC enthusiasts in the UK market, including both traditional flat packs and modern hump-style batteries that concentrate weight lower in the chassis. This compatibility with multiple battery configurations is particularly valuable because battery selection directly impacts your vehicle's handling characteristics, acceleration, top speed potential, and overall runtime. The chassis works exclusively with the #3725R ESC mounting plate, which has been engineered as a matched system to ensure your electronic speed controller sits at the optimal position within the chassis, maximising airflow for cooling whilst maintaining structural integrity during aggressive cornering, jumps, and impacts. Whether you're running a Bandit or Bandit VXL model, a Rustler or Rustler VXL, this chassis provides the dependable performance foundation that competitive and recreational RC drivers depend on.
What's in the Box
- Traxxas Lower Chassis (Black) TRX3728
What You Need to Complete
- #3725R ESC Mounting Plate (required for installation)
- Battery pack (flat or hump-style, up to 166mm in length)
- Electronic Speed Controller (ESC) compatible with your vehicle model
- Motor and drivetrain components appropriate for your specific Traxxas model
Frequently Asked Questions
- Will this lower chassis fit my Traxxas Bandit or Rustler? — Yes, the Traxxas Lower Chassis (Black) TRX3728 is specifically designed as a replacement part for Bandit, Bandit VXL, Rustler, and Rustler VXL models. You must use it only with the #3725R ESC mounting plate to ensure proper fitment and electrical compatibility.
- What battery packs will fit in the 166mm battery compartment? — The 166mm length accommodates both flat and hump-style battery packs within this size specification. This means you have flexibility to choose between different battery chemistries, capacities, and pack configurations to optimise your vehicle's performance for different driving conditions and styles.
- Can I use this chassis with a different ESC mounting plate? — No, this lower chassis is engineered to work only with the #3725R ESC mounting plate. Using any other mounting plate could result in improper fitment, misalignment of electrical connections, or structural compatibility issues. Always use the correct mounting plate to ensure optimal performance and safety.
- Is this suitable for beginners? — This is a replacement chassis component designed for users who already own a compatible Traxxas vehicle and have basic mechanical knowledge for chassis assembly and battery installation. If you're new to the RC hobby, we recommend starting with a complete ready-to-run RC car package that includes all necessary components pre-assembled and tested.
- What is the difference between this and other Traxxas chassis options? — The TRX3728 features a 166mm long battery compartment specifically designed to accommodate both flat and hump-style battery packs, making it more versatile than chassis versions with different battery compartment lengths. The black colour finish and compatibility with the #3725R mounting plate make this the correct choice for specific Traxxas models like the Bandit and Rustler series.
- How does battery selection affect my RC car's performance? — The battery you choose impacts weight distribution, acceleration, top speed, and runtime. The 166mm compartment length gives you options to experiment with different batteries to fine-tune your vehicle's handling and performance characteristics for different driving styles and track conditions.
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 Lower Chassis (Black) (166mm long battery compartment) (fits both flat and hump style battery packs) (use only with #3725R ESC mounting plate) TRX3728 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: Traxxas
- Model Number: TRX3728
- Part Number: 3728
- Product Type: Lower Chassis
- Colour: Black
- Battery Compartment Length: 166mm
- Battery Compatibility: Flat and hump-style battery packs
- Required ESC Mounting Plate: #3725R
- Compatible Vehicle Models: Bandit, Bandit VXL, Rustler, Rustler VXL
- EAN: 020334372802
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.
