Take control of your ride with the Controltech RAS-23 Stem, an elite component engineered for cyclists who demand surgical precision, unwavering stiffness, and absolute control over their cockpit setup. Designed with a balance of science, strength, and sophistication, the RAS-23 isn’t just another stem—it’s a performance upgrade built for road warriors, XC racers, and gravel grinders who need unshakable stability and refined responsiveness through every terrain twist and turn.
At the heart of the RAS-23’s uncompromising design lies 3D-forged AL6061 aluminum, a material celebrated for its exceptional strength-to-weight ratio. This forging process, superior to traditional casting, realigns the aluminum grain structure under intense pressure, producing a stem that is not only lighter and stiffer, but also drastically more durable—ideal for intense racing or rugged off-road assaults. The clean, seamless form that results is as aerodynamic as it is aesthetically clean.
Its RAS-23 technology, a refinement in structural integrity and load dispersion, translates into more confident descending, better sprint stability, and sharper cornering feedback. Whether you're accelerating on a climb or slicing through switchbacks, the RAS-23 minimizes flex and transfers your input with precision, letting you feel more connected to the bike and the road beneath you.
The faceplate, also crafted from AL6061, offers a steel-like toughness while keeping the weight low, ensuring your handlebars remain locked in with unyielding grip—even under high-torque efforts. And thanks to its flip-flop functionality, the stem can be mounted to give either a +5° or -5° rise/drop, letting riders fine-tune their handlebar height for maximum comfort or aerodynamic efficiency depending on ride style or discipline.
Recognizing the importance of personalized fit, the RAS-23 comes in a wide range of extensions from 60mm to 110mm, accommodating riders of all sizes and geometries. It’s compatible with 31.8mm bar clamps and 28.6mm steerers, covering the majority of modern road, CX, MTB, and gravel setups. Installation is a breeze, thanks to SCM-435 high-strength steel bolts, which offer rock-solid clamping force while resisting corrosion and wear over time.
The sandblasted matte black anodized finish not only looks stealthy and premium, but also adds a protective layer against scratches, sweat, and the elements—ensuring the stem continues to look as good as it performs, even after countless miles.
Summary of Why the RAS-23 Stands Out:
RAS-23 Engineering: Advanced stability and handling for aggressive, high-speed control.
3D-Forged AL6061 Body: Maximizes stiffness while reducing unnecessary grams.
Dual-Orientation Fit: +5° or -5° rise/drop adjustability for tailored performance.
Race-Ready Versatility: Equally at home in road races, cross-country trails, or cyclocross circuits.
Precision-Fit Options: Multiple lengths for optimal cockpit geometry.
Sleek Durability: Anodized sandblasted finish ensures rugged good looks for the long haul.
