[Lifetime Warranty] Bicycle Bike Derailleur Hanger Derailleur Bracket Bike Tail Hook Frame Gear Tail Hook Aluminium Alloy Mountain Rear - for Cyclocross, Mountain, Road Racing Bike - Pack of 2

Aluminum Alloy Rear Derailleur Hanger

Key Features

• Precision Casting:Manufactured from high-quality aluminum alloy to ensure exact fitment and reliable shifting performance.
• Sacrificial Design:Engineered to bend or break under high impact to protect the expensive bike frame and rear derailleur from catastrophic damage.
• High-Strength Finish:Features a corrosion-resistant coating that withstands environmental exposure in cyclocross and mountain biking conditions.
• Smooth Shifting Support:Provides a rigid mounting point for the rear derailleur, ensuring precise chain movement and gear indexing.
• Value Bundle:Includes a pack of two hangers, providing an essential spare for trailside repairs or emergency maintenance.

Replaces / Cross-Reference Part Numbers

• Product Type:Rear Gear Mech Hanger / Tail Hook
• Standard Classification:Universal Frame Component (Check specific geometry for compatibility)

Compatibility & Fitment

• Cyclocross & Road Racing:Fits various aluminum and carbon fiber frames requiring a standard alloy tail hook.
• Mountain Bikes (MTB):Compatible with many hardtail and full-suspension models utilizing a bolt-on dropout design.
• Frame Attachment:Designed for frames where the hanger is secured with a small screw to the internal or external side of the dropout.
• Note:Always compare the shape and bolt hole alignment of your existing hanger with the replacement part to ensure a correct fit.

When to Replace

• Bent Hanger:The derailleur hangs inward toward the spokes or is visibly twisted, leading to poor shifting or ghost shifting.
• Impact Damage:After a crash or if the bike falls on the drive side, the metal may be fatigued or cracked.
• Stripped Threads:The mounting hole for the derailleur bolt is cross-threaded or stripped, preventing a secure connection.
• Broken Hook:The hanger has snapped as designed during a collision to save the frame.

Installation Tips

• Clean the Dropout:Remove any dirt, grease, or metal shavings from the frame dropout area before installing the new hanger.
• Threadlocker Usage:Apply a small drop of low-strength threadlocker to the small mounting screw to prevent it from vibrating loose.
• Alignment Check:After installation, use a derailleur hanger alignment gauge to ensure the part is perfectly parallel with the wheel; even new hangers may require slight adjustment.
• Derailleur Tension:Ensure the "B-limit" screw on the derailleur is correctly positioned against the hanger tab during reassembly.
• Test the Gears:Manually shift through the entire range while the bike is in a stand to verify there is no interference with the spokes in the largest cog.