- 【Model & Compatibility】 The RD-TY21B-GS rear derailleur is designed for 6 and 7-speed SIS index shifting drivetrains, ensuring precise compatibility.
- 【Direct Mount Design】 Features a direct mount system (not hanger mount). Please confirm your bike’s mount type before purchase.
- 【Stable Performance】 Forged from high-quality aluminum alloy, it enables precise adjustment and stable gear shifts for a safer ride.
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