Hubgear chainring.
Shimano Alivio Shimano FC-M4000 Chainring
Shimano FC-T521 chainring 36T-AL, black
Shimano FC-M771 chainring silver 26T
Shimano FC-4700 chainring MK - 50-34T
Shimano FC-M617 chainring, 38T-AZ
Shimano FC-M675 chainring, 24T AM-type
