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Features shimano 1x12v rd-rx822 sgs grx 51t
Silent and safe Shimano shifting on rough terrain
Features:- Adjustable chain stabilizer prevents chain jumping and dropping
- SHIMANO SHADOW RD+
- Smooth and reliable shifting on mixed surfaces
- The stabilizer ON/OFF switch adapts to the terrain
- GS/SGS gearbox interchangeable and replaceable
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