Series: SHIMANO 105 R7000 Series. Shimano GRX Rear Derailleur Shadow+ RD-RX810 - 2 x 11 Speed. Stable shifting performance. Shimano GRX Rear Derailleur Shadow+ RD-RX812 - 1 x 11 Speed. Shimano Deore XT RD-M786-SGS Shadow + Rear Derailleur - Black - Long Cage.