SRAM, X01 DH, Rear Derailleur, Speed: 7, Cage: Medium, Black

SRAM, Rival1 Type 3.0, Rear derailleur, 11sp., Medium, Black

SRAM, GX Type 2, Rear derailleur, 10sp., Medium cage, Black

Shimano, Ultegra Di2 RD-R8150, Rear Derailleur, Speed: 12, Cage: GS, Black, IRDR8150F

SRAM, X01 Eagle B2, Rear Derailleur, Speed: 12, Lunar

Shimano, Rear Derailleur, Rd-M3100, Alivio, Sgs 9-Speed, Top Normal, Shadow Design, Direct Attachment