Traxxas TRX-4 Centre Driveshaft Extension Kit Internal Spline TRX9250

Overview

The Traxxas Driveshaft Extension Kit Centre (TRX9250) is an essential spare part and upgrade component designed specifically for Traxxas TRX-4 scale RC crawlers and trail trucks. This precision-engineered drivetrain component extends the driveshaft for the 336 mm wheelbase chassis, allowing you to customise and optimise your TRX-4 platform for different build configurations and chassis lengths. Whether you're a dedicated RC enthusiast looking to expand your fleet with alternative chassis setups, or an experienced modeller seeking to fine-tune your trail crawler's performance characteristics, this extension kit offers the flexibility and quality you'd expect from Traxxas.

The TRX-4 platform has earned its reputation as one of the most capable and customisable 1/10 scale RC crawlers available in the UK market. From the Nissan Pathfinder to the classic Chevrolet K10 and Ford F-150 variants, the TRX-4 chassis serves as the foundation for numerous authentic replica models. This driveshaft extension kit is a critical component for builders and enthusiasts who want to adapt their TRX-4 to different wheelbase configurations, ensuring proper drivetrain geometry and optimal power delivery across multiple platform variations. If you're serious about maximising your TRX-4's potential or building a more versatile collection of RC crawler platforms, this genuine Traxxas spare part is an indispensable addition to your workshop.

RC Model Shop stocks genuine, authorised Traxxas products, and we understand the importance of reliability when investing in spare parts and upgrades for your RC car UK setup. The TRX9250 represents quality engineering you can trust, manufactured to Traxxas's exacting standards to ensure perfect fitment and durability through countless hours of trail driving, rock crawling, and off-road exploration.

Key Features

• Multiple shaft length options — This extension kit includes four precision-engineered internal-spline driveshafts in different lengths (two XX-long, one medium, and one short), giving you maximum flexibility to configure your TRX-4 for various wheelbase lengths and chassis geometries. The variety of shaft lengths ensures you can dial in the perfect setup for your specific build requirements, whether you're assembling a stock configuration or creating a custom variant.
• Internal-spline shaft design — Each shaft features internal spline construction, a design choice that provides robust engagement with your driveline components while minimising wear and ensuring smooth, reliable power transmission throughout extended driving sessions. This engineering approach has been proven across thousands of TRX-4 builds and represents the professional standard for RC crawler drivetrain components.
• Compatible with multiple TRX-4 variants — This kit is specifically engineered to work seamlessly with a wide range of Traxxas TRX-4 models, including the unassembled chassis kit, the Nissan Pathfinder SE-V6 3S RTR, the Chevrolet K10 Cheyenne High Trail Edition (available in red, metallic blue, black, and metallic copper), the Ford F-150 Ranger XLT High Trail Edition (in brown, blue, and black variants), the 1972 Chevrolet K5 Blazer High Trail Edition (in blue and red), and the 1979 Chevy Blazer electric all-terrain crawler (in black and red). This comprehensive compatibility list demonstrates the kit's versatility across the entire TRX-4 product line.
• Genuine Traxxas manufacturing — Sourced directly from Traxxas, this component carries the full weight of the manufacturer's quality assurance and engineering expertise. You're purchasing an authentic spare part, not a third-party substitute, ensuring perfect fitment and performance that matches your original equipment specifications.
• Essential upgrade for custom builds — If you're expanding your TRX-4 collection with different models or chassis variants, or if you're constructing a fully custom platform from an unassembled kit, this driveshaft extension kit becomes a critical component. It allows you to adapt your drivetrain configuration to match your specific wheelbase requirements, ensuring proper geometry and optimal performance.

Technical Performance

The TRX-4 Centre Driveshaft Extension Kit represents Traxxas's commitment to modular design and customer customisation. The inclusion of four shafts in graduated lengths—two XX-long, one medium, and one short—provides builders with the comprehensive options needed to configure drivelines for different TRX-4 chassis geometries. The internal-spline design delivers reliable torque transfer while accommodating the precise tolerances required in modern RC crawler platforms. These shafts are manufactured from durable materials engineered to withstand the repetitive load cycles, articulation movements, and occasional impacts inherent to serious trail crawling and rock crawling applications. The precision engineering ensures minimal backlash and vibration, contributing to the precise handling and responsive control characteristics that TRX-4 users depend upon. Whether you're running your crawler through technical rock gardens, navigating extreme articulation courses, or exploring demanding trail systems, these driveshaft components are designed to maintain consistent performance under challenging conditions. The modularity of this kit—with multiple length options in a single package—eliminates the need for separate purchases and allows builders to complete various TRX-4 configurations from a single inventory investment.

What's in the Box

• Internal-splined driveshaft XX-long (quantity: 2)
• Internal-splined driveshaft medium (quantity: 1)
• Internal-splined driveshaft short (quantity: 1)

Frequently Asked Questions

• Which TRX-4 models does this driveshaft extension kit fit? — This kit is compatible with the full range of TRX-4 platform variants, including the TRX82216-4-R6 unassembled chassis kit, TRX110056-4-RED and TRX110056-4-SLVR Nissan Pathfinder SE-V6 3S models, TRX92056-4 series Chevrolet K10 Cheyenne High Trail models (available in red, blue, black, and metallic copper), TRX92046-4 series Ford F-150 Ranger XLT High Trail Edition models (brown, blue, and black), TRX92086-4 series 1972 Chevrolet K5 Blazer High Trail models (blue and red), and TRX82276-4 series 1979 Chevy Blazer electric all-terrain crawlers (black and red). If you own any TRX-4 variant, this kit is likely compatible with your platform.
• Why would I need a driveshaft extension kit for my TRX-4? — The driveshaft extension kit becomes essential when you're building from an unassembled TRX-4 chassis kit, when you're swapping between different TRX-4 body variants that feature different wheelbase lengths, or when you're customising your chassis geometry beyond standard configurations. The multiple shaft lengths allow you to optimise your drivetrain configuration for your specific build, ensuring proper driveline angles and eliminating binding or excessive play that could affect handling and durability.
• What's the difference between the XX-long, medium, and short shafts? — These shafts are designed in graduated lengths to accommodate different wheelbase configurations and driveline geometry requirements across the TRX-4 platform range. The XX-long shafts suit extended wheelbase setups, the medium shaft addresses standard configurations, and the short shaft accommodates compact or heavily customised builds. The variety ensures you can achieve proper driveline alignment regardless of your specific chassis configuration.
• Is this a genuine Traxxas product? — Yes, absolutely. This is an authorised genuine Traxxas component, not an aftermarket substitute. It carries the full Traxxas part number TRX9250 and meets Traxxas's manufacturing and quality standards, ensuring perfect compatibility and reliability with your TRX-4.
• Do I need any special tools to install these shafts? — Installation requires standard RC model tools and mechanical knowledge. The internal-spline design ensures straightforward fitment with your existing TRX-4 driveline components. If you're unfamiliar with driveshaft installation on RC crawlers, consult your TRX-4 manual or seek guidance from experienced RC enthusiasts in the UK hobby community.
• Can I use all four shafts in a single TRX-4? — No, you'll select the appropriate shaft length or combination based on your specific chassis configuration. The kit provides options so you can choose the correct setup for your particular build, or you can maintain multiple shaft options if you're working with different TRX-4 platforms.

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 Driveshaft extension kit, centre (includes internal splined, xx-long (2), internal splined, medium (1) and internal splined, short (1)) TRX9250 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.