![This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road](https://preview.redd.it/s4abblelrfd61.jpg?auto=webp&s=5159fb6f886c239422c33969b834b2088a719bcf)
This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road
![Wholesale SHIMANO GRX RX810 RX812 groupe 170 172.5 175mm 40 42T pédalier levier dérailleur Cassette 1X11s vélo de route frein à disque costume From m.alibaba.com Wholesale SHIMANO GRX RX810 RX812 groupe 170 172.5 175mm 40 42T pédalier levier dérailleur Cassette 1X11s vélo de route frein à disque costume From m.alibaba.com](https://sc04.alicdn.com/kf/H067c8181c9ed456c88092715ccef8330E.png)
Wholesale SHIMANO GRX RX810 RX812 groupe 170 172.5 175mm 40 42T pédalier levier dérailleur Cassette 1X11s vélo de route frein à disque costume From m.alibaba.com
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