The shimano sm bb71 road press fit bottom bracket with inner cover for 865 mm is a complete ultegra level press fit bottom bracket assembly for shimano hollowtech ii road cranks the cups are produced with fibre reinforced polymer material this reduces the risk of frame noise and damage the shimano set includes left and right hand cups inner cover and inner o rings by having sealed cups they ensure the dirt and water keep at bay the shimano sm bb71 road press fit bottom bracket is complet