Shimano Bicycle Freewheel (7-speed, MF-TZ21)

Shimano Tourney MF-TZ21 Bicycle Freewheel (7-speed, 14–28T, threaded)

The original Shimano Tourney MF-TZ21 7-speed bicycle freewheel is designed for installation on the rear hub of mountain (MTB), city, folding, and youth bicycles. The component screws onto the hub thread and combines a block of 7 driven sprockets with an internal ratcheting freewheel mechanism. Thanks to Shimano Tourney's proprietary tooth profiling technology, it provides crisp, quiet, and smooth gear shifting.

Key Advantages and Features:

• 100% Original Shimano: Guarantees long service life, precise tolerances, and stable operation of the ratcheting mechanism.
• Smooth Shifting Technology: Special tooth shaping and guide ramps facilitate chain transition from sprocket to sprocket under load.
• Popular Gear Range (14–28T): Optimal gear set for comfortable uphill pedaling and confident acceleration on flat roads.
• Protective Anti-Corrosion Coating: Combined finish (black large sprocket + bronze main sprockets) protects the metal from rust and wear.

Compatibility with Bicycles and Drivetrains:

• Bicycle Types: Mountain, city, road, and folding bicycles with a 7-speed (or 21-speed 3x7) drivetrain.
• Hub Type: Rear hub with classic right-hand thread.
• Compatible Chains: Standard 6-7-8 speed chains (Shimano HG40, KMC Z7, CN-HG71).

Technical Specifications:

Package Includes:

1. Shimano Tourney MF-TZ21 Freewheel — 1 pc.