SunRace CS-M637

The SunRace CS-M637 is a 7-speed cassette designed for riders seeking reliable shifting performance and durability.

With its Super Fluid Drive technology, it ensures smooth gear transitions, making it suitable for various cycling disciplines, including mountain biking, touring, and commuting.

The CS-M637’s construction and gear progression make it a practical choice for cyclists looking to maintain or upgrade their 7-speed drivetrain with a component that balances performance and longevity.

• Speeds: 7-speed
• Gear Range: 1228T (12-14-16-18-21-24-28)
• Technology: Super Fluid Drive for enhanced shifting performance
• Material: Nickel-plated steel cogs for increased durability and corrosion resistance
• Compatibility: Fits Shimano HG freehub bodies; compatible with Shimano, SRAM, and SunRace 7-speed systems
• Weight: Approximately 248 gram