Gebhardt 3/32" 2mm chainring. Made of: dural - aluminium. Campagnolo FC-RE950 Record 12 Speed 145 BCD Chainring 50T. Camagnolo FC-AT650B Athena 11 Speed 2009/10 Outer Chainring 50T In Black. Campagnolo FC-SR134 Super Record - Record - Chorus 11 Speed 5-Arm Chainring 34T.
