Shimano Hollowtech II Axle FC-7800 O-Ring Crank Arm Y1F316000 (1X Piece) Genuine
£4.99
Compatibility - Shimano Y1F316000. Shimano part no.: Y1F316000. They are needed as they apply pressure to the bottom bracket bearing in the correct area. As far as we are aware they fit any Hollowtech 2 shimano LH Crank.
