Shimano WH-RS21 Freehub Body
Best reliable replacement for maintaining wheel performance.
A precise factory replacement part designed to revive worn wheel hubs. It restores reliable power transfer and smooth engagement, extending the lifespan of existing wheelsets without the need for a complete replacement.
$38.21
at
365 Cycles
Who it's for
- Cyclists needing a direct replacement for their compatible Shimano wheels.
- Riders experiencing degraded shifting or power loss due to a worn freehub.
- Users seeking long-lasting, dependable components from a trusted brand.
Who should skip it
- Cyclists with non-WH-RS21 wheels or those seeking universal compatibility.
- Beginners without specialized tools or experience in bicycle component replacement.
- Riders with older or non-standard cassettes who need to ensure compatibility.
Performance breakdown
Engagement Precision
Factory-standard pawl design ensures reliable, consistent power transfer under load.
Installation Simplicity
Requires specific cone wrenches and mechanical know-how for proper hub assembly.
Durability Standards
Robust steel construction handles daily road riding stresses with minimal wear.
Compatibility Match
Perfect fitment for WH-RS21 wheelsets eliminates guesswork during the repair process.
Bearing Smoothness
Provides a reliable spin that matches the original factory performance specifications.
Cassette Interface
Standard HG splines offer secure, slip-free mounting for modern road cassettes.
Key Specs
Component Type
Freehub Body
Compatibility
Shimano WH-RS61, WH-RS31, WH-RS21, WH-RS11
Drivetrain Speeds
11, 12
Freehub Body Type
Shimano HG
Axle Type
Quick Release
Hub Spacing
130mm
Brake Type
Rim Brake
Material
Steel
Part Number
Y49V98040
Know before you buy
Still have a question?
Ask Metto anything about the Shimano WH-RS21 Freehub Body before you decide.