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- Color: Black
- Material: Aluminum
- Chainring BCD: 130
- Defined Color: Black
- Ring Position/TYPE: Single
This fits your .
Shimano Alfine S501 1x Chainrings Color: Black. Material: Aluminum. Chainring BCD: 130. Defined Color: Black. Ring Position/TYPE: Single. Drivetrain Speeds: Single Speed 3/32″. Tooth Count: 45.