ASA105/ASA105N is an ultra-light rigid ahead stem designed for performance-oriented bicycle builds that need a streamlined one-piece stem structure. According to the verified product data, the stem uses 3D forged 7050-T6 aluminum, a 31.8mm handlebar clamp diameter, a 28.6mm steerer size, and a 40mm height.
The product is available in multiple extension and angle options. The +/-7 degree version covers 60/70/80/90/100/110/120/130mm extensions, while the +/-17 degree version covers 80/90/100/110/120/130mm extensions. This makes ASA105/ASA105N suitable for riders, brands, and wheel-build specifications that need precise cockpit fit options across different frame sizes and riding positions.
The flip-flop mounting concept gives added fit flexibility when the correct stem length, angle, handlebar clamp, and steerer standard are confirmed. This page keeps the technical claims aligned with the supplied and verified product data and does not add unprovided details such as bolt material, finish options, or torque values.
Technical Specification
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Product Features & Benefits
• 7050-T6 aluminum 3D forged one-piece rigid ahead stem.
• Ultra-light and streamlined design for clean cockpit setup.
• Multiple extension and angle options for flexible bike fitting.
• Flip-flop mounting orientation supports different riding positions when compatible.
• 31.8mm handlebar clamp and 28.6mm steerer configuration.
• ISO 4210 - R/M approved and EN 17404 listed in the verified product data.
Applications
• Road, MTB, city, trekking, and general bicycle builds when specifications are compatible.
• Cockpit upgrades requiring a 31.8mm handlebar clamp and 28.6mm steerer.
• Performance-focused builds that prioritize lighter weight and a streamlined stem profile.
• Fit adjustments using different extension and angle options.
• OEM and aftermarket bicycle assembly projects using rigid ahead stem standards.
Installation Guide / Recommendations
• Confirm handlebar clamp diameter, steerer diameter, extension, and angle before installation.
• Choose the correct +/-7 degree or +/-17 degree option according to the required riding position.
• When using flip-flop mounting, verify cockpit clearance and final handlebar height.
• Use the bicycle or component manufacturer recommended tightening sequence and torque values.
• After installation, check handlebar alignment, steerer clamping, and secure fastening before riding.
Related Products
• AS007N
• AL222
• AL7301
