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- Model Shimano Tourney (SIS) RD-TZ31-GS 6/7 speed,medium-cage, direct mount.No retail packaging. Items as shown.
- Specifications Total capacity(aka chain capacity) 34T, Largest sprocket 28T, Smallest sprocket 14T, Front chainwheel tooth difference 20T.
- Compatibility Compatible with 6 and 7-speed SIS Index Shifting drivetrains, for mountain bike.
- Tools Required 5mm allen wrench.