Sunrace CSM980 9spd 11-40T Cassette - Live4Bikes
Sunrace CSM980 9spd 11-40T Cassette - Live4Bikes

Sunrace CSM980 9spd 11-40T Cassette - Live4Bikes

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The Sunrace CSM980 9-speed 11-40T Cassette is a remarkable addition to any mountain bike, offering a wide gear range and smooth shifting capabilities to tackle various terrains with ease. Let's delve into its features and explore why purchasing from Live4Bikes is the best choice to make.

Exceptional Performance with Wide Gear Range

The Sunrace CSM980 boasts a 9-speed configuration with a wide gear range of 11-40T, making it perfect for mountain biking enthusiasts who enjoy challenging terrains. The cassette provides a sufficient low-end gear for effortless climbs and a high-end gear for speedy descents or flat sections. This versatile range ensures that riders can handle any trail, from steep ascents to fast descents, without feeling limited by their gear options.

Smooth Shifting and Precise Gearing

The CSM980's design includes precisely machined teeth and ramps, ensuring smooth and seamless shifting between gears. This smooth transition enhances the rider's experience by eliminating any interruptions in pedaling rhythm during gear changes. The cassette's precise gearing also contributes to efficient power transfer, maximizing each pedal stroke and conserving energy during long rides.

Durable Construction for Longevity

Constructed with durable materials, the Sunrace CSM980 cassette is built to withstand the demands of off-road riding. The robust steel cogs are engineered to resist wear and maintain their performance over extended use. This longevity ensures that your investment in the CSM980 will pay off in the long run, providing reliable performance on your mountain biking adventures for years to come.

Why Purchase from Live4Bikes?

  1. Expertise and Customer Support: Live4Bikes specializes in bicycles and cycling accessories, and their team of experts is dedicated to providing top-notch customer support. They can guide you in choosing the right cassette for your specific needs and help with any inquiries you may have about the CSM980 or other products.

  2. Wide Selection of Products: Live4Bikes offers a diverse range of bicycle components and accessories, including the Sunrace CSM980 cassette. You can find various options to suit different riding preferences and budgets, making it a one-stop-shop for all your biking needs.

  3. Quality Assurance: Live4Bikes ensures that all their products, including the Sunrace CSM980 cassette, are genuine and of the highest quality. This means you can purchase with confidence, knowing you're getting an authentic and reliable product.

  4. Fast and Reliable Shipping: Live4Bikes prides itself on timely and efficient shipping, ensuring that you receive your purchased items promptly and in excellent condition.


The Sunrace CSM980 9-speed 11-40T Cassette is a fantastic choice for mountain biking enthusiasts seeking exceptional performance and durability on the trails. Its wide gear range, smooth shifting, and robust construction make it a reliable companion for tackling various terrains. By purchasing from Live4Bikes, you can enjoy the benefits of their expertise, vast product selection, and top-notch customer support, making your cycling experience even more enjoyable and satisfying



 A Comprehensive Guide to Bicycle Cassettes: Finding the Right One for Your Ride

Bicycle cassettes play a crucial role in determining the performance and efficiency of your ride. With various options of bicycle cassettes available in the market, selecting the right cassette can be a daunting task. In this guide, we will explore how to find the perfect bicycle cassettes for your needs, understand the difference between a cassette and freewheel, explore the impact of the number of teeth on gear ratio, and discuss the requirements when converting to a 1x drivetrain.

1. Cassette vs. Freewheel:

Before delving into cassette selection, it's essential to understand the difference between a cassette and a freewheel. Both components are found in the rear wheel hub and consist of a set of sprockets that engage with the bicycle chain. However, a cassette is a separate unit, while a freewheel combines the sprockets with the freewheeling mechanism. Most modern bikes use cassettes due to their improved performance, easier maintenance, and the ability to interchange gear ratios more efficiently.

2. Choosing the Right Cassette:

When selecting a cassette, consider factors such as the terrain you'll be riding on, your fitness level, and your bike's drivetrain compatibility. Cassettes come in various speeds, ranging from 7 to 12 speeds, each offering a different number of sprockets. The more sprockets a cassette has, the narrower the gaps between gears, providing smoother gear transitions.

3. Understanding Gear Ratio and your cassette . 

The gear ratio refers to the relationship between the number of teeth on the front chainring and the rear cassette sprockets. A cassette with a wide range of teeth, such as an 11-32T, provides a broad selection of gears suitable for climbing steep hills and tackling challenging terrains. On the other hand, a narrow range, like an 11-23T, is ideal for flat roads and high-speed riding.

4. Transitioning to a 1x Drivetrain and cassettes 

A 1x drivetrain eliminates the front derailleur and offers a simplified setup with a single front chainring and a wide-range cassette at the rear. When converting to a 1x drivetrain, it's essential to choose the appropriate front chainring size to maintain a suitable gear range. Riders seeking versatility may opt for a larger front chainring, like a 38T or 40T, while those who prioritize climbing and off-road riding might choose a smaller chainring, such as a 30T or 32T. Also keep in mind that adding more teeth to the low gears will have its limits depending on the length of your rear derailleur.  For example a 11-42t cassette will need a long cage derailleur.  There is short , mid and long rear derailleurs. 

Selecting the right bicycle cassette is paramount to enhancing your cycling experience. With an understanding of cassette vs. freewheel distinctions, the impact of the number of teeth on gear ratio, and the requirements for transitioning to a 1x drivetrain, you can make an informed decision. Consider your riding style, terrain, and desired performance to find the perfect cassette that suits your needs. Whether you're a seasoned cyclist or a beginner, having the right cassette can significantly improve your efficiency, comfort, and enjoyment on the road or trail. Happy cycling!