Wheels Manufacturing BB30 to Campagnolo Crank Axle Shims. Run Campagnolo cranks in your BB30 frame. Shims are based on industry standard BB30 bottom bracket shells. Easy to install and machined for exact fit. Shims press fit directly into BB30 bearings (6806). You will need the 6806 bearings already installed into the BB30 shell to start this conversion. Removal is the opposite of installation.