SRAM Cage Lock- new bike with SRAM XO derailleur, muddy day so was washing things off and this little piece went flying. Discovered it's the cage lock, cool feature but it's ridiculously
X01 Eagle Rear Derailleur | RD-X0-1-B2 | SRAM
SRAM XX1/X0/X9/X7 Type 2 Rear Derailleur Cage Lock with Spring | eBay
SRAM XX1 / X01 Eagle Type 3 Cage Lock
SRAM Rear Derailleur Clutch Cage Lock w Spring 11.7518.045.000
SRAM XX1/X0/X9/X7 Type 2 Rear Derailleur Cage Lock with Spring | eBay
SRAM X01 2.1 Rear Derailleur - Components
XX1 Eagle AXS derailleur | RD-XX-1E-A1 | SRAM
SRAM X9 Type 2 10-Speed Rear Derailleur - Smart Bike Parts