Elevate every ride with the Controltech RAS-23 Stem, a pinnacle of innovation and precision-crafted performance. Engineered for riders who demand control, responsiveness, and lightweight strength, the RAS-23 isn't just a component—it's an essential upgrade for serious cyclists chasing efficiency on the road or trail. Whether you're carving descents, climbing steep gradients, or sprinting through technical turns, this stem ensures your bike responds with unwavering confidence.
At the heart of the RAS-23 is 3D forged 6061 aluminium, a premium alloy known for its high strength-to-weight ratio. Unlike cast constructions, 3D forging refines the molecular structure of the alloy, creating a dense, uniform material that is both lighter and significantly more robust. This process reduces unnecessary mass while maintaining maximum stiffness—ensuring that every watt of power is transferred efficiently and every input is translated into clean, immediate response.
Complementing this is a 6061 aluminium faceplate, offering steel-like strength without the weight penalty. It clamps your bars securely, minimizing any micro-flex that could sap power or lead to discomfort. With this level of security, you can confidently push your limits, knowing your setup is as solid as your ambition.
The RAS-23 Stem also incorporates an intelligent flippable ±5° angle design, offering a versatile fit for a range of riding postures. Need an aggressive aero tuck for a time trial? Flip it for a negative drop. Prefer a more upright, endurance-friendly setup for gravel grinding or long road tours? Use the positive rise. This adaptability makes the RAS-23 not just high-performance but also deeply rider-centric.
Fit and functionality are further enhanced by the wide size range—available in six lengths from 60mm to 80mm—allowing you to dial in your cockpit ergonomics with surgical precision. It seamlessly accommodates 31.8mm handlebars and 28.6mm steerers, making it compatible with most modern road and mountain bikes. And because it’s been purpose-built for both disciplines, it delivers elite-level performance across surfaces—whether you're bombing down rocky singletracks or slicing through tarmac.
Every detail in the RAS-23 stem has been refined for real-world performance. It’s not just about numbers on a spec sheet—it’s about how those specs translate to feel, to flow, to that seamless interface between rider and machine. With improved handling precision, enhanced lateral stiffness, and reduced weight, it’s a stem built for riders who understand that every component matters.
Why Choose Controltech RAS-23?
Built from aerospace-grade 3D forged 6061 aluminium for exceptional strength and weight savings
Steel-like faceplate strength for secure handlebar clamping
Flippable ±5° angle for personalized riding positions
Available in optimized lengths from 60mm to 80mm
Compatible with standard 31.8mm handlebars and 28.6mm steerers
Designed for both Road and MTB use
