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SKU: RRDR0504

BOX Two Prime 9 X-Wide Rear Derailleur - 9-Speed Long Cage, Matte Onyx, Durable Forged Cages, Pivot-Tech Cable Stay, Limited Slip Clutch, 11-50t Compatibility, for E-MTB & Mountain Bike Performance

Regular price $141.99
$141.99 Sale price $141.99 Regular price
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This is a pre order item. We will ship it when it comes in stock.

$10 Gift Card

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$25 Gift Card

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$75 Gift Card

at 1,000 points

Description

Upgrade your mountain biking setup with the BOX Two Prime 9 X-Wide Rear Derailleur - 9-Speed, Long Cage, Matte Onyx. Engineered for durability and performance on demanding terrains, this high-quality derailleur offers exceptional functionality and sleek style, making it an essential component for trail riders and enduro enthusiasts seeking reliable shifting in challenging conditions.

Materials & Construction:

Constructed with a forged aluminum inner and outer cage, the BOX Two Prime 9 derailleur combines lightweight durability with robust strength. Its high-strength, 3-D forged linkages ensure long-lasting performance, even under intense riding conditions. The matte onyx finish not only adds a sophisticated look but also provides resistance against scratches and corrosion.

Performance & Engineering:

Designed to handle wide gear ranges, this derailleur is optimized for 11-50t cassettes, delivering the same expansive range as a 12-speed drivetrain with fewer gears to shift through. The innovative Pivot-Tech cable stay minimizes cable friction and enhances shifting precision. Its non-adjustable Tri-Pack clutch with a limited slip engagement mechanism reduces chain slap, prevents chain drops, and maintains consistent chain tension, ensuring smoother rides over rugged terrain.

Components & Technology:

Featuring Closed Bushing Pulleys and a pivot-tech cable stay, the derailleur ensures quiet operation and reliable performance. The clutch system engages instantly with constant torque, protecting your drivetrain from chain noise and drops, whether you're climbing steep trails or navigating rough cross-country routes. Fully serviceable and adjustable, the clutch allows for easy maintenance and tune-ups to keep your bike performing at its best.

Style & Use Case:

The sleek matte onyx finish complements any mountain bike aesthetic, making it ideal for aggressive trail riding, enduro racing, and E-MTB applications. Its long cage design provides ample chain wrap for large gear ranges, making it perfect for tackling steep climbs and fast descents alike. Plus, its durable construction meets the rigors of demanding electric mountain bike use, providing riders with confidence and consistency on every ride.

Innovative & Differentiating Features:

- Equivalent to a 12-speed range with fewer gears

- Non-adjustable Tri-Pack Clutch for reduced chain slap and dropped chains

- Fully serviceable and adjustable clutch mechanism

- Meets durability standards for E-MTB performance

- Forged and sealed components for long-term reliability

Enhance your mountain biking experience with the BOX Two Prime 9 X-Wide Rear Derailleur - a perfect combination of advanced engineering, style, and value, designed to keep you riding confidently on the toughest trails.

  • Optimized for 9-speed drivetrains with a long cage design, the BOX Two Prime 9 X-Wide Rear Derailleur ensures smooth, reliable shifting across wide gear ranges suitable for mountain biking and adventure rides.
  • Constructed with forged aluminum cages and durable 3-D forged linkages, this derailleur offers enhanced strength and resistance to harsh trail conditions while maintaining a lightweight profile.
  • Equipped with Prime 9 technology, it delivers a gear range comparable to a 12-speed system, reducing the complexity of shifting and improving efficiency on demanding terrain.
  • Featuring advanced Pivot-Tech Cable Stay system and closed bushing pulleys, the derailleur provides precise, consistent performance with decreased chain slap and minimized noise for a silent, controlled ride.
  • Designed with a limited slip clutch that engages instantly for superior chain retention, this drivetrain component is fully serviceable and adjustable, making it ideal for E-MTBs and aggressive trail riding.
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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


Company Core Values: 

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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