- Run Shimano HollowTech-II 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
- You may need to gently tap them out from the opposite side
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