e*thirteen Helix R 107 BCD 4-Bolt Chainring - 40t, 11/12-Speed, 107BCD, Black EA Chainrings

CR4HRA-149 e*thirteen Helix R 107 BCD 4-Bolt Chainring - 40t, 11/12-Speed, 107BCD, Black Chainrings EA Black Ring Position/Type Chain Retaining Single Ring Tooth Count 40 Drivetrain Speeds 11 Drivetrain Speeds 12 Round or Oval Round Chainring BCD 107 Material Aluminum Color Black Weight 74 Defined Color Black