SunRace CS-M40 Cassette – 7-Speed, 11-28T, Shimano HG Compatible

The SunRace CS-M40 7-speed cassette is a reliable replacement option for older MTB and hybrid drivetrains. With an 11-28T range and steel construction, it’s built for durability and consistent shifting performance on entry-level and commuter bikes.

Key Functional Details

• 7-speed cassette designed for MTB and hybrid drivetrains
• 11-28T gear range for balanced climbing and cruising
• Super Fluid Drive™ technology for smoother shifting
• Steel cogs and lockring for durability
• Compatible with Shimano HG-style freehub bodies
• Direct replacement for Shimano CS-HG20 / HG41

Technical Specifications

Compatibility & Technical Notes

• Fits Shimano HG freehub bodies (standard 8/9/10-speed style)
• Compatible with 7-speed drivetrains only
• Works with 7-speed chains and derailleurs
• Commonly used on older MTB, hybrid, and comfort bikes
• May require a spacer when installed on 8/9/10-speed freehub bodies
• NOT compatible with 8, 9, 10, 11, or 12-speed systems
• NOT compatible with Microspline or SRAM XD/XDR drivers

Service / Ownership Context

This cassette is typically used for repairs or budget drivetrain replacements. It’s a straightforward install for restoring shifting performance on older bikes without upgrading the entire drivetrain.

Fit & Use Signals

• Good Fit: Older MTB and hybrid bikes with 7-speed drivetrains
• Good Fit: Budget repairs and commuter bikes
• Good Fit: Riders replacing worn-out Shimano HG cassettes
• Not A Fit: Modern 8–12 speed drivetrains
• Not A Fit: High-performance or wide-range gearing needs
• Not A Fit: Freehub systems outside Shimano HG standard