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• Chainring BCD: 110
• Color: Silver
• Defined Color: Silver
• Drivetrain Speeds: 9
• Material: Aluminum  
• Shimano Sora 3450 9-Speed Chainrings Specifications: Defined Color: Silver Color: Silver Drivetrain Speeds: 9Material: Aluminum Tooth Count: 50 Ring Position/Type: Outer Chainring BCD: 110