Run Shimano Hollowtech-II Cranks in your BB30 frame.Features:Shims are based on industry standard BB30 bottom bracket shellsEasy to install and machined for exact fitShims press fit directly into BB30 bearings (6806)You will need the 6806 bearings already installed into the BB30 shell to start this conversionRemoval is the opposite of installationYou may need to gently tap them out from the opposite side
