BUCKLOS 90mm -17° Negative MTB Bike Stem | Aluminum Alloy

BUCKLOS 17° Negative Aluminum Alloy MTB Bike Stem – 90mm

Upgrade your mountain bike's handling and riding position with the BUCKLOS 17-Degree Negative Bike Stem. Precision CNC-machined from high-strength aluminum alloy, this 90mm stem delivers a responsive, low-profile feel ideal for downhill (DH), cross-country (XC), and trail riding. Whether you're carving technical singletrack or pushing the limits on descents, this stem provides the stiffness and geometry you need to ride with confidence.

Key Features

• Lightweight Hollow Design: CNC-machined aluminum alloy construction keeps weight to approximately 206g without sacrificing rigidity or durability.
• -17° Negative Rise Angle: Lowers your handlebar position for a more aggressive, aerodynamic riding stance — perfect for DH and XC disciplines.
• Smooth & Rust-Resistant Surface: High-strength aluminum alloy finish holds up against harsh weather including wind, rain, and trail debris.
• Precise CNC Machining: Ensures tight tolerances, consistent thread engagement, and long-lasting structural integrity.
• Universal Fit: 28.6mm steerer tube clamp diameter and 31.8mm handlebar clamp diameter make it compatible with most standard MTB forks and handlebars.
• Multiple Color Options: Available in White, Red, Yellow, and Green to match your bike's build.

Specifications

Who Is This For?

This stem is ideal for mountain bikers who want a more aggressive riding position. Whether you're a downhill racer, an XC competitor, or a weekend trail shredder, the BUCKLOS negative stem gives you a performance-focused setup straight out of the box.

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Frequently Asked Questions

Q: What handlebar diameter is compatible with the BUCKLOS 90mm MTB stem?

A: The BUCKLOS 17-degree negative stem is designed for a 31.8mm handlebar clamp diameter, which is the most common standard for modern mountain bike handlebars. Always verify your handlebar's diameter before installing.

Q: What does the "-17 degree" negative angle mean for my riding position?

A: A -17° negative rise angle means the stem angles downward from the steerer tube, resulting in a lower handlebar position. This creates a more aggressive, forward-leaning posture that improves aerodynamics and handling responsiveness — favored by downhill (DH) and cross-country (XC) riders.

Q: Is this stem compatible with standard 1-1/8" forks?

A: Yes. The BUCKLOS bike stem has a 28.6mm (1-1/8") steerer tube clamp diameter, which is the standard size for most modern mountain bike forks. It is compatible with threadless steerer tubes.

Q: How durable is the aluminum alloy material?

A: The stem is CNC-machined from high-strength aluminum alloy with a rust-resistant surface treatment, making it suitable for all-weather use including rain, mud, and dust. Its hollow design keeps it lightweight while maintaining the structural integrity needed for demanding trail conditions.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.