* Elegant, lightweight, trouble-free solution for adapting Shimano Hollowtech II cranks to new Pressfit 30-standard frames* Just press adapters into Pressfit 30 6806 bearing in BB shell, install spindle and cranks. It's that easy!* NOTE: Stock seals must be removed before installing Pressfit 30 adapter* Machined, engineering-grade Delrin * 48g/pr