About The Product
- Prime 9 Technology is a counter-intuitive philosophy based on the less is more theory - it embraces range without adding complexity
- Intended for use with Box Components` Prime 9 speed group, not compatible with other 11-50 cassettes
- Same functions as the Box One Prime 9 derailleur with more affordable materials
- Glass fiber/nylon composite, steel, aluminum alloy
- Tri-Pack limited slip clutch
- Forged inner and outer cage
- Pivot-Tech cable stay
- Precision sealed bushing pulleys
Upgrade your bike's rear shifting performance with the BOX Two Prime 9 X-Wide Rear Derailleur - 9-Speed, Long Cage, Matte Onyx. Engineered for durability, precision, and versatility, this high-performance derailleur is the ideal choice for riders tackling challenging terrain and demanding rides.
Premium Materials & Engineering:
Constructed with forged inner and outer cages, the BOX Two Prime 9 Rear Derailleur offers enhanced strength and rigidity, ensuring reliable gear shifts in all conditions. Its durable 3-D forged linkages and closed bushing pulleys provide increased longevity and smooth operation, even under intense riding.
Advanced Components & Technology:
Equipped with Prime 9 technology, this derailleur delivers the same gear range as a 12-speed system-covering an impressive 11-50t cassette-while simplifying gear shifts with fewer options. The Pivot-Tech cable stay reduces friction, ensuring precise and crisp shifting. The non-adjustable Tri-Pack Clutch with a limited slip mechanism engages instantly, minimizing chain slap, preventing chain drops, and enhancing overall chain engagement-perfect for aggressive riding and e-MTB applications. The clutch is fully serviceable and adjustable, offering ongoing maintenance ease.
Performance & Use Case:
Designed for wide-range gearing, the X-Wide compatibility makes it suitable for mountain biking, trail riding, and electric mountain bikes, where robust drivetrain performance is essential. The long cage configuration accommodates larger cassettes, making it perfect for riding across varied terrains and challenging climbs.
Style & Aesthetic:
Finished in a sleek matte Onyx, the derailleur complements modern, aggressive bike designs, providing a stealthy, professional look that aligns with high-performance builds.
Innovative Features:
- Wide-range compatibility (11-50t cassette) with 9-speed gearing
- Non-adjustable Tri-Pack Clutch with constant torque for chain retention
- Forged and durable construction for demanding riding conditions
- Fully serviceable and adjustable clutch system
- Engineered for E-MTB durability and reliability
Upgrade your drivetrain with the BOX Two Prime 9 X-Wide Rear Derailleur - the perfect blend of durability, innovative technology, and wide-range performance for serious cyclists seeking superior shifting and trail-ready reliability.
- Optimized for 9-speed setups with a long cage design to accommodate larger cassettes up to 11-50t, providing versatile gearing for varied terrains.
- Constructed from durable forged aluminum components, including the inner and outer cages, ensuring lightweight strength and long-lasting performance under demanding conditions.
- Equipped with advanced Pivot-Tech Cable Stay and a non-adjustable Tri-Pack Clutch, minimizing chain slap, reducing dropped chains, and increasing drivetrain stability for aggressive riding and e-MTB applications.
- Designed with closed bushing pulleys and a fully serviceable limited slip clutch, delivering smooth, reliable shifts and maintenance ease for both trail riding and endurance cycling.
- Sleek matte Onyx finish combined with innovative engineering and compatibility with modern 9-speed drivetrains makes this derailleur a perfect upgrade for riders seeking performance, style, and reliability on challenging terrains.
| Specification | Value |
|---|---|
| Manufacturer | BOX COMPONENTS |
| Manufacturer Part No. | BX-DR2-P9AXWC-BK |
| Universal Product Code | 639266097273 |
| Invoice Description | DER BOX RR TWO PRIME 9 9s X-WIDE BK |
| Shipping Weight | 0.60 lbs. |
| Package Dimensions | 7.7 x 5 x 3.7 |
| Country of Origin | TAIWAN |
| Speed | 9sp |
| Max | 50 |
| Cage/Mount | Long |
| Ratio | 2to1 |
| Color | BLK |
| Type | Mechanical |
- Supplier:
- JBI
Bike Junkies offers no‑hassle returns and exchanges within 60 days of delivery. We want every customer to feel confident when shopping with us, and our return process is designed to be simple, fair, and fast.
Return Eligibility
To qualify for a return or exchange, the following conditions must be met:
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The item must be in new, unused, and uninstalled condition.
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All original packaging, tags, hardware, and accessories must be included and intact.
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Items showing wear, installation marks, damage, or improper use cannot be accepted.
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An order number is required.
Once your return is received at our warehouse, a refund will be issued within 5 days after inspection.
Refunds
Refunds are issued to the original form of payment once the returned item has been received and approved. If we are unable to refund to the original payment method, the refund will be issued as store credit.
Depending on your bank or credit card provider, it may take an additional 2–3 business days for the refund to appear in your account.
Exchanges
To make an exchange, simply complete the return process and then place a new order for the item you want instead. This ensures the replacement item is reserved and ships quickly.
How to Start a Return
To request a Return Authorization (RA#), contact us at support@bikejunkies.com. Please include your order number and the item you wish to return.
Once approved:
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You will receive a Return Authorization email with instructions.
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Print the prepaid label provided by us. ($9.99 will be deducted from your refund)
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Ship the item back within 7 days of the RA being issued as RA #'s are only valid for 7 days.
Please do not tape anything to the original product packaging. Place the item inside a proper shipping box. Using the manufacturer’s box as the shipping container will result in damage and the return may be rejected.
Be sure to keep your return tracking number. Powersport Junkies is not responsible for lost return shipments. You will receive a confirmation email once your return has been processed and refunded.
Defective, Incorrect, or Damaged Items
If you receive a defective, damaged, or incorrectly shipped item, contact us immediately. We will cover the return shipping cost and ensure the issue is resolved quickly.
Non‑Returnable Items
Certain items cannot be returned, including:
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Electronics with opened packaging or broken manufacturer seals
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Any part that has been installed or shows installation attempts
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Tools or chemicals that have been opened or unsealed
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Open‑box items with destroyed or missing packaging
Our Info
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Storefront name: Bike Junkies
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Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
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Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
This Shipping Policy explains how orders are processed, handled, and delivered by Bike Junkies, including delivery timelines, shipping coverage, and special conditions for military addresses. It is designed to give customers a clear understanding of what to expect when placing an order.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Order Processing and Handling
Orders are processed quickly to ensure fast delivery. Our standard handling time is 0–1 business days. Order cutoff time is 12 PM PST Monday-Friday and orders placed after that will be shipped shipped next business day.
Transit Times
Once shipped, orders typically arrive within 2–3 business days. Transit times may vary slightly depending on the destination, weather conditions, or carrier-related delays. Delivery estimates apply only after the order has left our facility.
Delivery Schedule
Standard delivery occurs Monday through Friday. Saturday delivery may be available.
Shipping Coverage
Bike Junkies offers free shipping to the lower 48 states of the United States. We do not ship to the following locations:
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Alaska
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Hawaii
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Puerto Rico
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Any international destination outside the United States
Orders placed with shipping addresses in restricted locations will be canceled and refunded.
Military Shipping (APO/FPO)
Bike Junkies ships to APO/FPO military addresses using USPS only.
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We cannot ship hazardous materials or oversized items to military addresses due to carrier and military mail restrictions.
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Transit times to APO/FPO locations may vary significantly depending on military mail processing.
Address Accuracy and Delivery Issues
Customers are responsible for ensuring that all shipping information provided at checkout is accurate and complete. Bike Junkies is not responsible for delays, lost packages, or delivery failures caused by incorrect or incomplete addresses. If a package is returned due to an address error, additional shipping charges may apply to resend the order.
Lost, Delayed, or Damaged Shipments
If a shipment is delayed, lost, or arrives damaged, customers should contact us promptly so we can assist with initiating a claim or resolving the issue with the carrier. While we support the process, final decisions regarding claims are made by the carrier.
Tracking Information
A tracking number is provided via email once the shipping label has been created. Tracking updates may take up to 24 hours to appear after the label is generated.
Shipping Restrictions
Certain items may be subject to shipping restrictions due to size, weight, or hazardous material regulations. If an order cannot be shipped due to such restrictions, we will notify the customer to arrange an alternative solution.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
For warranty issues please contact us at support@bikejunkies.com. Each Brand is different and we can provide instruction to complete warranty issues.
Bike Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.
Our Info
-
Storefront name: Bike Junkies
-
Address: 940 Calle Amanecer, Suite N
San Clemente, CA 92673 -
Phone: 800-605-2152
-
Support email: support@bikejunkies.com
- Support hours + timezone:
Monday-Friday: 9:00 AM-5:00 PM PST
Saturday: 9:00 AM-3:00 PM PST
Sunday: Closed
