Over 2,000,000 Million Customers Served!!!

Need Help? Click the Live Chat to Talk to a Gearhead 💪

Enjoy Free Shipping on Orders Over $75 – Available Within the Lower 48 States!

Load image into Gallery viewer, Sunrace-11-51-Cassette-CASS0874-Bicycle-Cassettes
Load image into Gallery viewer, Sunrace CSMZ800 12sp Cassette, 11-51t - Black

SKU: CASS0874

Sunrace CSMZ800 12-Speed Mountain Cassette 11-51T, Wide-Range HG Freehub, Lightweight Aluminum & Composite Components, Fluid Drive Plus Shifting, Compatible with Shimano 12-Speed Drivetrains for Off-Road Performance

Regular price $98.37
$99.99 Sale price $98.37 Regular price
Sale Sold out
Unit price
/per 
Save 2%
  • Free Shipping Over $75
  • 30 Day Returns
  • Satisfaction Guaranteed!
Get 10% Off When You Buy 2!

$10 Gift Card

at 250 points

$25 Gift Card

at 500 points

$75 Gift Card

at 1,000 points

This is a pre order item. We will ship it when it comes in stock.

$10 Gift Card

at 250 points

$25 Gift Card

at 500 points

$75 Gift Card

at 1,000 points

Description
Specifications

Enhance your mountain biking performance with the Sunrace CSMZ800 12-Speed Cassette, 11-51T - Black. Designed for serious riders seeking a wide gear range and lightweight durability, this high-performance cassette is compatible with Shimano 12-speed drivetrains and HG freehub bodies (8-11 speed). Crafted from premium materials including aluminum spiders and lockring, with composite spacers, it offers exceptional strength while remaining lightweight at only 665 grams.

Featuring the innovative Fluid Drive Plus shifting technology, the CSMZ800 ensures smooth, precise gear changes across the 11-51T range, ideal for tackling steep climbs and fast descents. Its wide gear range delivers reliable performance for trail, enduro, and all-mountain riding, providing the versatility to conquer diverse terrains. The sleek black finish not only enhances your bike's aesthetic but also resists corrosion and wear over time.

Key Components & Technology:

- 12-speed performance optimized for Shimano-compatible setups

- Wide range of 11-51 teeth for maximum gear flexibility

- Fluid Drive Plus shift technology for smoother, more responsive shifting

- Constructed from lightweight aluminum with durable composite spacers and lockring

Style & Use Case:

Ideal for mountain biking enthusiasts and professional riders alike, the Sunrace CSMZ800 cassette offers ultimate versatility, durability, and speed. Perfect for aggressive trail rides, enduro racing, and mountain adventures where reliable gear shifting and wide-range gearing are essential.

Upgrade your drivetrain with this innovative, high-quality cassette and experience seamless shifting performance, enhanced durability, and the confidence to push your limits on every ride. Choose the Sunrace CSMZ800 12-Speed Cassette for unbeatable value and top-tier mountain biking technology.

  • High-strength, lightweight construction utilizes high-quality aluminum alloy spiders and composite spacers to optimize durability and reduce overall weight, making it ideal for demanding mountain biking adventures.
  • Features Fluid Drive Plus technology for seamless, precise shifting performance across a wide 11-51t gear range, enhancing rider confidence on steep climbs and technical descents.
  • Designed for compatibility with Shimano 12-speed drivetrains and HG freehub bodies (8-11 speed), this cassette offers versatile integration for a smooth, efficient drivetrain setup.
  • The wide-range 11-51t gear ratio provides maximum gear flexibility for diverse terrain, allowing cyclists to conquer steep gradients and fast descents with ease.
  • Sleek black finish not only adds a stylish, modern look but also offers increased resistance to scratches and corrosion, ensuring long-lasting performance in rugged cycling conditions.
Speed12
ColorBlack
Model NameCSMZ800
Cogs11,13,15,17,19,21,24,28,33,39,45,51
Freehub TypeHG (8-11sp)
Range11-51
Weight665g
Shipping
Returns
About Us
Contact Us

We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

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.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

  • Our Mistake: If we messed it up you can rest assured we are going to make it right. Contact us by email, phone, or chat and we will make your head spin with how quick we fix it
  • Warranty: We are an authorized retailer for everything we sell, so rest assured your product is covered under the manufacturer's warranty. Contact Us if you are having an issue and we will make sure you are taken care of
  • Just don't want it anymore: We have a 30-day return policy for orders within the US. We offer refunds on returned items that are brand new and in their undamaged, original packaging. Customers are responsible for the cost of return shipping. Damaged, installed, and used items as well as those without original packaging are not eligible for returns. If it's returned in this condition it may be denied and sent back to you

If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

*Please allow up to 3 business days for us to process your return*

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!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

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. 

Customer Loyalty

Put yourself in their shoes and support those who support us.

You Control the Outcome

If it is to be, it’s up to me" You are personally responsible for controlling the outcome.

Seek Understanding

Understanding the answer is more important than the answer.

Progress Not Perfection

Pick a direction, analyze the results, and be willing to change course.

Will to Win

Customers, 365 Team, Partners, all need the will to win. Bring the Will to Win to every conversion.

Keep Moving

Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.

Do the Right Thing:

Doing the right thing is more important than doing the thing right.

Stronger together:

If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

Chat

Talk with a representative

Start Chat

Email

info@365cycles.com

Send Email

Phone

603-968-5797

Call Now

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)