About The Product
- XD compatible wide ratio cassette
- 6 sprockets on 2 alloy spider carriers
Upgrade your mountain biking setup with the Sunrace CS-MX9X 11-Speed Cassette, engineered for ultimate performance and wide-range versatility. Designed for aggressive riders and trail enthusiasts, this 10-42t cassette offers seamless gear transitions and durable construction to conquer challenging terrains with confidence.
Premium Materials & Engineering
Constructed from high-quality alloy materials, the Sunrace CS-MX9X cassette ensures lightweight durability and corrosion resistance for long-lasting performance. The precision-machined cogs and robust construction provide smooth engagement and minimal wear, even under demanding riding conditions.
Advanced Components & Technology
Featuring a 11-speed compatible design with an expansive 10-42 tooth range, this cassette delivers precise gear ratios that optimize power transfer and climbing ability. Its wide ratio configuration is ideal for tackling steep ascents and high-speed descents alike. The cassette employs a durable XD compatibility, ensuring compatibility with a variety of modern drivetrain systems and enhancing overall shifting performance. The innovative layout includes 6 sprockets mounted on 2 alloy spider carriers, reducing weight for efficient climbing and acceleration.
Performance & Use Case
Perfect for trail, enduro, and mountain biking disciplines, the Sunrace CS-MX9X cassette provides reliable, smooth shifting across diverse terrains. Its wide gear range allows cyclists to maintain momentum on steep climbs while enjoying high-speed descents. Whether hitting rugged trails or technical mountain paths, this cassette helps you push your limits with confidence.
Style & Design
With a sleek black/rad color scheme, the Sunrace CS-MX9X complements any mountain bike build, offering a professional and performance-oriented aesthetic. Its rugged construction and precision engineering ensure it withstands the rigors of intense off-road riding.
Key Features:
- Wide ratio 10-42t cassette for versatile terrain handling
- XD compatibility for seamless integration with modern 11-speed drivetrains
- Crafted from lightweight, durable alloy materials
- 6 sprockets on 2 alloy spider carriers for optimized weight and strength
- Perfect for trail, enduro, and mountain biking applications
- Smooth and reliable shifting performance in aggressive riding conditions
Enhance your mountain bike's drivetrain with the Sunrace CS-MX9X 11-Speed Cassette - engineered for durability, designed for adventure, and built to elevate your riding experience.
- High-performance 11-speed cassette engineered for mountain biking and gravel riding, featuring a wide gear range from 10 to 42 teeth for optimal climbing and acceleration.
- Constructed from durable alloy sprockets with advanced heat treatment, ensuring long-lasting performance and reliable shifting in demanding trail conditions.
- XD driver compatibility allows seamless integration with a variety of modern XD-free hubs, providing a sleek, lightweight profile and improved power transfer.
- Innovative 6-sprocket design mounted on two alloy spider carriers reduces weight while maintaining stiffness, enhancing drivetrain efficiency and responsiveness.
- Versatile wide ratio gear setup is ideal for aggressive trail riding, enduro, and bikepacking, offering smooth shifting and consistent performance across varied terrain.
| Specification | Value |
|---|---|
| Manufacturer | SUNRACE |
| Manufacturer Part No. | CSMX9X.ETYR.OS0.BX |
| Universal Product Code | 4710944263930 |
| Invoice Description | FH CASS SUNRACE CSMX9X 10-42 BK/RD 11s |
| Shipping Weight | 1.16 lbs. |
| Package Dimensions | 8.1 x 7.2 x 2.2 |
| HTS Number | 8714.93.7030 |
| Country of Origin | TAIWAN |
| Range | 10-42t |
| Gears | 11sp |
| Cogs | 10,12,14,16,18,21,24,28,32,36,42 |
| Color | Black/Red |
| Weight | 485g |
- 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
-
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
