The Shimano Ultegra level Bottom Bracket uses Shimano HollowTech II technology which uses a wider ...The Shimano Ultegra level Bottom Bracket uses Shimano HollowTech II technology which uses a wider outer bearing placement and larger axle diameter for increased stiffness and efficiency. While it's sealed design has a minimal bearing interface ensuring smooth rolling and increased durability. The latest version of HollowTech II used here is lighter and has 50% lower rotational friction than previous version. This complete Ultegra level press-fit bottom bracket assembly is for Shimano HollowTech II road cranks. Cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damage. Set includes left and right hand cups, inner cover, and inner O-rings. Sealed cups keep out dirt and water and are maintenance free. Compatible with 86.5 mm shells and has a 41 mm cup diameter. Features easy press-fit installation.
The Shimano Ultegra level Bottom Bracket uses Shimano HollowTech II technology which uses a wider outer bearing placement and larger axle diameter for increased stiffness and efficiency. While it's sealed design has a minimal bearing interface ensuring smooth rolling and increased durability. The latest version of HollowTech II used here is lighter and has 50% lower rotational friction than previous version. This complete Ultegra level press-fit bottom bracket assembly is for Shimano HollowTech II road cranks. Cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damage. Set includes left and right hand cups, inner cover, and inner O-rings. Sealed cups keep out dirt and water and are maintenance free. Compatible with 86.5 mm shells and has a 41 mm cup diameter. Features easy press-fit installation.