SRAM Rival XPLR eTap AXS 12s Rear Derailleur, XG1251 10–44 cassette, RED chain

SRAM Force 12spd AXS XPLR rear derailleur

SRAM GX Axs 12 Speed rear derailleur

sram force axs rear derailleur 12 speed

Shimano Wireless Di2 GRX Rear Derailleur Long Cage, 12 speed, battery included

SRAM Red 007518084001 22 WiFli 11 speed Carbon Rear Derailleur med cage 32t max

SRAM Red Rear Derailleur Black 10 Speed Short Cage with extra pulleys

SRAM GX Eagle 12-Speed Rear Derailleur