e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t, 11/12-Speed, 107BCD, Black EA Chainrings

CR4HRA-150 e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t, 11/12-Speed, 107BCD, Black Chainrings EA Black Ring Position/Type Chain Retaining Single Ring Tooth Count 42 Drivetrain Speeds 11 Drivetrain Speeds 12 Round or Oval Round Chainring BCD 107 Material Aluminum Color Black Weight 81 Defined Color Black