About The Product
- 12-speed MTB cassettes
- 7075 aluminum 42T-50T sprockets
- Alloy spider, lockring and spacers
Upgrade your bike's performance with the SunRace CS-MZ90 12-Speed Cassette, a versatile and robust component designed for serious cyclists seeking optimal gear range and durability. Crafted with precision, this 11-50T cassette offers an expansive gear ratio, ideal for tackling steep climbs and high-speed descents, making it perfect for mountain biking, gravel riding, and adventure cycling.
Materials & Construction:
Constructed with high-quality alloy components, including the spider, lockring, and spacers, the SunRace CS-MZ90 ensures lightweight durability and long-lasting performance. The sleek black chrome finish not only enhances aesthetic appeal but also provides superior corrosion resistance, ensuring your cassette stays looking new ride after ride.
Performance & Engineering:
Designed specifically for 12-speed drivetrain systems, this cassette delivers smooth, precise shifting across a wide gear range from 11T to 50T. The alloy construction minimizes weight-total weight is approximately 586 grams-without compromising strength. The 7 sprockets mounted on 2 spider carriers provide stable gear engagement and efficient power transfer, enhancing rider confidence on challenging terrains.
Components & Technology:
Compatible exclusively with SRAM 12-speed rear derailleurs, the CS-MZ90 does not support Shimano or Shimano-compatible micro-spline or XD freehub bodies, utilizing the common HG freehub body for seamless integration. The wide ratio design (11-50T) offers exceptional climbing ability and high-speed capability, making it an ideal choice for demanding off-road adventures.
Style & Use Case:
Featuring a sleek black chrome finish, this cassette combines durability with a modern aesthetic, suited for aggressive mountain biking, gravel grinding, and endurance riding. Its wide gear range not only boosts versatility but also allows for more efficient cadence adjustment across diverse terrains.
Innovative & Differentiating Features:
- Wide gear ratio (11-50T) for climbing and cruising
- Alloy spider, lockring, and spacers for lightweight strength
- Compatible with SRAM 12-speed rear derailleurs (Shimano compatibility not supported)
- Designed for HG freehub bodies, optimized for mountain biking and gravel applications
- Black chrome finish for enhanced corrosion resistance and sleek style
Enhance your riding experience with the SunRace CS-MZ90 12-Speed Cassette - engineered for performance, built for adventure. Whether climbing steep trails or cruising long descents, this high-performance cassette ensures smooth shifts, durability, and a wide gear range to conquer every terrain.
- Enhance your mountain biking and gravel adventures with the SunRace CS-MZ90 12-Speed Cassette, featuring a wide gear ratio from 11 to 50 teeth for optimal climbing and sprinting performance.
- Constructed with durable alloy spider, lockring, and spacer components, this cassette ensures lightweight strength and reliable shifting under demanding conditions.
- Designed specifically for SRAM 12-speed rear derailleurs and HG freehub bodies, offering seamless compatibility and precise gear indexing for smooth, confident rides.
- Finished in a sleek black chrome coating, the SunRace CS-MZ90 adds an aggressive, modern style to your drivetrain, perfect for both aggressive trail riding and endurance cycling.
- Innovative engineering includes a 7-sprocket configuration mounted on dual spider carriers, providing enhanced durability, optimized weight distribution, and efficient power transfer on rugged terrains.
| Specification | Value |
|---|---|
| Manufacturer | SUNRACE |
| Manufacturer Part No. | CSMZ90.WA5R.OS0.BX |
| Universal Product Code | 4710944256918 |
| Invoice Description | FH CASS SUNRACE CSMZ90 11-50 BK/CP 12s |
| Shipping Weight | 1.42 lbs. |
| Package Dimensions | 9.4 x 8.6 x 2.1 |
| HTS Number | 8714.93.7030 |
| Country of Origin | TAIWAN |
| Range | 11-50t |
| Gears | 12sp |
| Cogs | 11,13,15,17,19,21,24,28,32,36,42,50 |
| Color | Black |
| Weight | 586g |
- 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
