Overview
The ARRMA M3x12.5mm Screw Shaft is an essential replacement part for RC enthusiasts and serious hobbyists who demand reliability and precision in their machine. Whether you're a weekend basher running an RC monster truck in the UK or a competitor fine-tuning your brushless RC vehicle, these high-quality screw shafts are designed to keep your RC car performing at its best. As an original ARRMA component, this part is engineered to exact specifications and built to withstand the extreme conditions that come with high-performance RC driving.
These precision-engineered fasteners are not merely cosmetic upgrades—they are critical functional components that ensure your RC truck, buggy or short course vehicle operates smoothly and reliably. ARRMA's reputation for quality in the RC hobby market means you can trust these parts to deliver consistent performance, whether you're pushing your 1/10 scale brushless monster truck to its limits or maintaining a well-used RC platform. The M3x12.5mm specification makes this shaft compatible with several popular ARRMA models including the BIG ROCK 223S, GRANITE 223S, KRATON 4X4, and SENTON 223S families.
Choosing genuine ARRMA replacement parts is a smart investment in the longevity and performance of your RC vehicle. Rather than struggling with inferior aftermarket alternatives, these authentic screw shafts provide the reassurance that comes from using factory-approved components, ensuring perfect fitment and reliable operation every single time.
Key Features
- Strong Steel Construction — Manufactured from durable steel, these screw shafts are built to withstand the extreme stresses and vibrations encountered during aggressive RC driving, delivering long-lasting reliability whether you're bashing through rough terrain or racing on track.
- Precision Machine Thread — The precision-engineered thread ensures fast and easy servicing, allowing you to quickly disassemble and reassemble your RC vehicle without frustration, saving you valuable time during maintenance and upgrades.
- 2.5mm Hex Driver Fit — The standardised 2.5mm hex socket design ensures hassle-free installation and removal, compatible with common hex driver tools and allowing for quick swaps without fumbling with incompatible tools.
- Exact M3 x 12.5mm Specification — This metric sizing (3mm thread diameter, 12.5mm overall length) ensures perfect compatibility with ARRMA RC vehicles that require these dimensions, eliminating guesswork and potential fitment issues.
- Genuine ARRMA Component — As an authorised ARRMA part, these screw shafts are manufactured to the same exacting standards as original equipment, providing authentic replacement quality you can depend on.
- Black Finish — The professional black colour coating matches original ARRMA parts and resists corrosion, maintaining both aesthetic appeal and functional integrity over extended use.
Technical Performance
These M3x12.5mm screw shafts represent precision engineering at its finest, combining robust steel construction with meticulous dimensional tolerances to create fasteners that perform reliably in the demanding world of 1/10 scale RC vehicles. The machine thread design is optimised for the specific torque requirements of ARRMA's brushless monster trucks, short course trucks and speed platforms, ensuring that vibration and extreme driving conditions won't cause loosening or premature failure. The 2.5mm hex driver specification aligns with industry-standard tools, meaning you won't need to hunt for obscure hexagon keys when it comes time to service your RC truck. Whether you're working on a BIG ROCK 223S brushless monster truck, a GRANITE 223S with DSC transmission technology, the high-speed KRATON 4X4 4S V2 BLX, or the nimble SENTON 223S short course platform, these shafts deliver the precision fit and functional reliability that keeps your RC car performing lap after lap, run after run.
What's in the Box
- 2 x M3 x 12.5mm Screw Shaft
Frequently Asked Questions
- What ARRMA RC models use the M3x12.5mm screw shaft? — This part is compatible with several popular ARRMA brushless RC vehicles including the 1/10 BIG ROCK 223S DSC 4X4 RTR Brushless Monster Truck (available in Green, Black and Blue variants), the 1/10 GRANITE 223S DSC 4X4 RTR Brushless Monster Truck (available in Red, Blue and Gun Metal), the 1/10 KRATON 4X4 4S V2 BLX Speed Monster Truck RTR (including the Green variant), and the 1/10 SENTON 223S BLX Brushless 4X4 Short Course Truck RTR with DSC (available in Blue/Purple and Yellow variants). If you own any of these models, you'll want to keep spare M3x12.5mm shafts on hand.
- Why would I need replacement screw shafts for my RC truck? — In intensive RC use—whether bashing through rough terrain, racing on track, or practising tricks—fasteners can wear, become stripped or occasionally break. Having genuine ARRMA replacement shafts ensures you can quickly return your brushless RC vehicle to action without compromise, maintaining factory-spec performance and fit.
- Is this a difficult part to install? — No, installation is straightforward thanks to the standardised 2.5mm hex driver fit and precision machine thread. Most RC enthusiasts can swap these shafts in minutes using common hex tools, making maintenance quick and hassle-free.
- How many screw shafts come in this pack? — This pack contains 2 x M3x12.5mm Screw Shafts, providing a spare set or allowing you to replace multiple shafts on your RC vehicle during a comprehensive service or upgrade session.
- Are these genuine ARRMA parts? — Yes, these are authentic ARRMA replacement components manufactured to the same exacting standards as the parts supplied with your RC truck. Using genuine parts ensures perfect fitment, reliability and compatibility with your specific model.
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 ARRMA M3x12.5mm Screw Shaft (2) Z-ARA727312 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.
