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Shimano Tz31 21 Speed the 7 Speed of Mountain Bike Direct Mount Rear Derailleur
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- Shimano TZ31
- 7 speed Direct Mount
- Rear Derailleur
- Suitable for mountain bike/road bike use
- Suitable for Bike frame with hook
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New Rear Derailleur The latest version of RD-TZ30 31
Bike Type: MTB，road bike
materials:High quality plastic and alloy
Classification:TZ31 eye poking a
Speed: 6/7 SPeed
Direct mount mainly used in aluminum alloy bike frame.
1 x TZ 31-21 Rear Derailleur
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Instruction on Youtube really sucks. Too much zooming in.