About The Product
- 12-speed MTB cassettes
- 7075 aluminum 42T-50T sprockets
- Alloy spider, lockring and spacers
Experience superior performance and unbeatable versatility with the Sunrace CS-MZ90 12-Speed Cassette, engineered for aggressive mountain biking and trail riding. Designed to deliver smooth shifting across a wide gear range, this high-quality bike cassette combines advanced materials, innovative engineering, and cutting-edge technology to elevate your ride.
Materials & Construction:
Crafted from durable 7075 aluminum, the Sunrace CS-MZ90 features lightweight yet robust sprockets, including the large 42T and 50T cogs, ensuring longevity and reliability in demanding terrain. The alloy spider, lockring, and spacers further enhance durability while keeping weight to a minimum, making it an excellent choice for serious MTB enthusiasts seeking both strength and agility.
Performance & Engineering:
This 12-speed cassette offers an extensive gear range from 11T to 50T, providing optimal gearing versatility for climbing steep trails and conquering rugged terrains. The precise engineering allows for crisp, reliable shifting across all gears, giving riders confidence in every ride. The wide 11-50T sprocket range is ideal for steep inclines and fast descents, making it perfect for trail, enduro, and all-mountain riding.
Components & Technology:
Featuring 12 high-performance sprockets with a mix of smaller and larger gears, the Sunrace CS-MZ90 utilizes advanced component design to ensure seamless gear engagement. The alloy construction minimizes weight without compromising strength, while the integrated design ensures smooth operation under high torque.
Style & Use Case:
Designed for mountain biking enthusiasts, this cassette is compatible with modern 12-speed drivetrains and is suitable for aggressive trail riding, enduro, and mountain adventures. Its sleek, professional look complements a wide range of bike styles, while its technology-driven features make it a must-have upgrade for riders seeking maximum control and efficiency.
Innovative & Differentiating Features:
The Sunrace CS-MZ90 stands out with its high-strength 7075 aluminum sprockets, oversized 50T gear for aggressive climbing, and lightweight alloy components that enhance performance without added weight. Its wide gear range ensures optimal gear ratios for any trail condition, making it an essential upgrade for serious MTB riders looking for durability, versatility, and performance.
Upgrade your mountain bike with the Sunrace CS-MZ90 12-Speed Cassette-designed for durability, precision, and performance on every trail. Optimize your shifting, conquer steep climbs, and experience the ultimate riding flexibility today.
- High-performance 12-speed MTB cassette designed for aggressive trail riding and mountain biking adventures.
- Constructed with durable 7075 aluminum sprockets ranging from 42T to 50T, ensuring lightweight strength and long-lasting durability in rugged terrains.
- Features innovative alloy spider, lockring, and spacers that optimize weight savings and smooth shifting performance, providing reliable gear transitions under demanding conditions.
- Versatile gear range from 11T to 50T makes it ideal for climbing steep ascents and conquering technical descents, enhancing rider confidence and control.
- Compatible with standard 12-speed drivetrain systems, this cassette is perfect for upgrading your mountain bike's performance with advanced engineering and cutting-edge components.
| Specification | Value |
|---|---|
| Manufacturer | SUNRACE |
| Manufacturer Part No. | CSMZ90.WA5R.XS0.BX |
| Universal Product Code | 4710944256925 |
| Invoice Description | FH CASS SUNRACE CSMZ90 11-50 M-SL 12s |
| Shipping Weight | 1.42 lbs. |
| Package Dimensions | 9.55 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 | Matte Silver |
| 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
