CONTROLTECH ONE STEM RAS-80 | Lightweight 6061 MTB Stem

CONTROLTECH ONE STEM RAS-80 is a high-performance, value-for-money bicycle stem designed for riders who demand stiffness, precision, and lightweight durability on every ride. Built using advanced 3D forged 6061 aluminum, it offers a perfect balance of strength and reduced weight, making it ideal for mountain biking and aggressive trail riding. The forging process improves structural rigidity compared to traditional casting while keeping the stem compact and efficient for better handling and control on technical terrain. With a reversible 5-degree rise or drop option, riders can fine-tune their riding position for comfort or performance based on their riding style. Available in multiple sizes from 60mm to 120mm, it ensures precise bike fit and improved riding posture for both amateur and professional cyclists.

Key Features

• Material: 3D forged 6061 aluminum for superior strength and lightweight performance

• Design: Forged construction delivers higher stiffness and durability than cast stems

• Angle: Reversible 5° rise or drop for flexible riding position adjustment

• Compatibility: Fits 28.6mm steerer tube and 31.8mm handlebar clamps

• Weight: Approx. 121g for lightweight and responsive handling

• Faceplate: 6061 aluminum faceplate with steel-like strength and reliability

• Sizes: Available from 60mm to 120mm for precise bike fit and control

Product Specifications

• Material: 3D forged 6061 aluminum

• Handlebar Diameter: 31.8mm

• Steerer Clamp Diameter: 1 1/8”

• Angle: 5° reversible

• Intended Use: Mountain biking

• Size Range: 60mm–120mm

• Weight: Approx. 121g / 135g (as per manufacturer specification)

• Faceplate Material: 6061 aluminum

Build Quality & Performance Engineering

• Structural Strength: 3D forged aluminum construction enhances rigidity and reduces flex under load

• Ride Precision: Improved stiffness ensures accurate steering response on rough and technical trails

• Comfort Tuning: Reversible angle design allows fine adjustment for better riding posture

• Durability: High-grade 6061 aluminum ensures long-term performance under demanding conditions

• Riding Versatility: Suitable for XC, trail, and all-mountain setups with consistent control

Easy Operation / Usage

• Install using standard 31.8mm handlebar and 1 1/8” steerer compatibility

• Flip stem orientation to switch between +5° rise or -5° drop

• Tighten faceplate bolts evenly for secure and balanced clamping

• Adjust stem length selection (60–120mm) for optimal bike fit

Why Choose This Product

• Delivers professional-level stiffness at a value-for-money price

• Lightweight design improves bike handling and responsiveness

• Strong forged construction ensures long-lasting reliability

• Adjustable geometry supports comfort and performance riding styles

• Trusted CONTROLTECH engineering for precision cycling components

In the Box

• 1 x CONTROLTECH ONE STEM RAS-80