SHIMANO RD-TY21 Rear Derailleur 6/7 Speed Rear Shifter
$4.00
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SHIMANO RD-TY21 Rear Derailleur 6/7 Speed Rear Shifter for compatible bicycle and electric-bicycle drivetrain systems.
Compatibility checklist
- Match the listed number of speeds
- Confirm cassette or freewheel type and mounting standard
- Check chain, shifter and derailleur compatibility
- Compare the exact model number and installation dimensions
Installation: Correct alignment and adjustment are required for reliable shifting. Professional installation is recommended.