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SKU: RD6137

SRAM NX Eagle 12-Speed Rear Derailleur - Long Cage Black for E-Mountain Bikes, 1x Drivetrain with X-HORIZON & Eagle Pulley Technology, Durable Type-3 Clutch, High-Performance 50T Capacity for Crisp Shifting & Quiet Operation

Regular price $109.78
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Description
Specifications

Enhance Your Mountain Biking and Trail Riding with the SRAM NX Eagle Rear Derailleur - 12-Speed, Long Cage, Black

Upgrade your drivetrain with the SRAM NX Eagle Rear Derailleur, engineered for seamless shifting performance and durability on rugged trails. Crafted with precision materials and innovative engineering, this 12-speed derailleur is designed to handle challenging terrains, making it the ideal choice for aggressive riders and mountain biking enthusiasts.

Materials & Construction:

Built with high-quality steel and lightweight aluminum components, the SRAM NX Eagle Rear Derailleur offers durability and corrosion resistance. Its sleek black finish not only adds a stylish aesthetic but also withstands the elements, ensuring longevity in harsh riding conditions. The robust construction supports rigorous trail riding and extended use.

Performance & Engineering:

Featuring the proven SRAM 1x-specific X-HORIZON design, this derailleur delivers crisp, accurate shifts across a wide gear range. The larger, 14-tooth X-SYNC lower pulley optimizes chain management and reduces drivetrain noise, providing an ultra-smooth pedaling experience. The Type-3 Roller Bearing Clutch maintains chain tension for quiet operation, improved chain retention, and enhanced overall drivetrain stability, especially on technical terrain.

Components & Technology:

Equipped with Eagle pulley technology, the NX Eagle derailleur ensures greater efficiency, quicker shift response, and quieter operation, even under load. Designed for use with SRAM Eagle 12-speed chains, it supports a maximum cassette capacity of 50 teeth, accommodating 11- to 50-tooth cassettes for versatile gear options. The long cage design offers a chain wrap capacity of 40 teeth, making it suitable for extensive gear ranges and e-bike compatibility.

Style & Use Case:

With a sleek black aesthetic, the SRAM NX Eagle Rear Derailleur complements modern mountain bikes and e-bikes alike. It's perfect for aggressive trail riders, enduro racers, and mountain biking enthusiasts seeking reliable performance on demanding trails. Whether ascending steep climbs or descending technical descents, this derailleur ensures confident and precise gear shifts every ride.

Innovative & Differentiating Features:

- Re-positioned Cage Lock system enhances durability and simplifies maintenance.

- Compatible with SRAM X-Actuation shifters for smooth and consistent shifting.

- Optimized for e-bike applications, expanding versatility for pedal-assist riders.

- Designed with an emphasis on durability, efficiency, and quiet operation for demanding off-road conditions.

Upgrade your mountain bike drivetrain with the SRAM NX Eagle Rear Derailleur - the perfect combination of robust engineering, advanced technology, and trail-ready style for all your off-road adventures.

  • Precision-engineered with SRAM's proven X-HORIZON design for smooth, reliable 12-speed shifting across challenging terrain.
  • Constructed from durable, lightweight materials optimized for long-lasting performance and resistance to harsh riding conditions.
  • Features the innovative Type-3 ROLLER BEARING CLUTCH for quiet operation, reduced chain slap, and enhanced chain retention, ensuring consistent drivetrain performance.
  • Compatible with Eagle 12-speed chains and capable of handling up to a 50-tooth cassette, making it ideal for versatile mountain biking, trail riding, and e-bike applications.
  • Sleek black finish combined with advanced pulley technology delivers a stylish look and whisper-quiet shifting, perfect for high-performance and aesthetic-driven cycling enthusiasts.
Largest Cog50
ColorBlack
Rear Der/Shifter CompatibilitySRAM X-Actuation
Rear Derailleur Mount Type10x1 Standard
Drivetrain Speeds12
Designed for ebikeYes
Chain Wrap Capacity (teeth)40
Cage LengthLong
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

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Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


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These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

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Customer Reviews

Based on 35 reviews
94%
(33)
6%
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C
Customer

Brand new in the box perfect;

S
Scott Laughlin

Great derailleur. It has worked flawlessly. It comes with an alignment tool that helps you set it up for perfect alignment.;

C
Customer

Brand new in the box perfect;

S
Scott Laughlin

Great derailleur. It has worked flawlessly. It comes with an alignment tool that helps you set it up for perfect alignment.;

A
Amazon Customer

Brand new in the box perfect