5BG _z_78_z_ FD_h_M77_z_ clamp bolt M5 x 17_dot_5 mm Shimano Spares Silver 17_dot_5 mm 4524667223_z_92 Parts 4524667223_z_92 Transmissions Spares fdm77_z_ fd m77_z_ fdm 77_z_ 17_dot_5mm SPRE FDM77_z_ clamp blt M5x17_dot_5 Y5BG_z_78_z__z_ spare Shiamno Sim