BESNIN Adjustable Bike Stem 31.8 x 110mm, 0–120° CNC 6061 T6 Aluminum, Four-Bolt Faceplate 110mm

BESNIN adjustable bike stem is a CNC-machined 6061 T6 aluminum handlebar stem that rotates from 0° to 120° and fits 31.8 mm bars for quick, secure comfort and fit adjustments.

Swap a rigid stem for this versatile BESNIN piece to change riding posture, relieve wrist and shoulder strain, or convert an older mountain bike into a more upright commuter. Built from high-strength 6061 T6 aluminum with a four-bolt faceplate, the stem balances low weight and rigidity while offering a wider angle range than typical adjustable stems. It comes in a 31.8 x 110 mm size that suits most modern handlebars and supports MTB, road, BMX, and stationary bikes.

How does the 0–120° adjustment improve comfort on different rides?

Wide-angle adjustability lets you fine-tune handlebar height and reach without adding spacers. Riders who want an upright position for city commuting or a more aggressive forward tilt for faster road positions can achieve both with one component.

• 0–120° range covers low to very upright setups for varied riding styles
• Single stem replaces separate rise or angle adapters
• Reduces wrist, neck and shoulder pressure by optimizing posture

Will this stem fit my bike and bar diameter?

The BESNIN stem is designed for 31.8 mm handlebars and uses a standard 110 mm clamp length, making it broadly compatible with modern bikes. Its four-bolt faceplate and standard steerer clamp fit most forks and allow straightforward installation.

• Bar clamp diameter: 31.8 mm (standard road/MTB size)
• Stem length: 110 mm for balanced reach
• Compatible with MTB, road, BMX, DH, downhill and stationary bikes

What materials and construction ensure durability and light weight?

This stem is CNC-machined from 6061 T6 aluminum alloy, chosen for its strength-to-weight ratio and corrosion resistance. The machining and four-bolt faceplate provide even clamping pressure to protect the handlebar and maintain alignment under heavy use.

• 6061 T6 aluminum: strong, tough and corrosion-resistant
• CNC machining for precise tolerances and uniform clamping
• Four-bolt faceplate secures the bar without concentrated stress points

How easy is installation and what tools are needed?

Installation is straightforward: remove the current stem or cap, slide the BESNIN stem onto the steerer, set the angle, and tighten the bolts to spec. No special adapters are required for most bikes, and routine hex keys are sufficient for mounting and angle adjustments.

• Mounts directly to standard steerer tubes—no extra parts usually needed
• Four-bolt faceplate and steerer clamp use common hex wrenches
• Angle adjustment is simple; retighten bolts after settling and test alignment

Who is this for? Cyclists who want a single, reliable stem to cover multiple riding needs will benefit most: commuters converting mountain bikes to upright city rigs, mixed-terrain riders needing a flexible fit, older riders or anyone seeking reduced joint stress, and mechanics looking for a durable upgrade part. BESNIN's stem offers a wide adjustment range and solid CNC aluminum construction for riders who need both comfort tuning and dependable performance.