Y1VD98_z_1_z_ FC_h_R3_z_3_z_ Chainring 39T_h_MR Shimano Sora Grey 39 teeth 45246674757_z_5 Parts 45246674757_z_5 Transmissions Chainrings fcr3_z_3_z_ fc r3_z_3_z_ fcr 3_z_3_z_ chain ring chainrings chainrings rings chains chains 39T C_fsla_RING FCR3_z_3_z