BB6600B 6600 Ultegra Bottom Bracket - British Thread
Description
The bottom bracket bearings for the HollowTech II FC6600 crankset
Minimal bearing interface gives superbly smooth rolling
Required for installation of FC7800 chainset, with a choice of English or Italian thread BB cups
Set includes left and right hand cups, inner cover and inner O-rings
Sealed cups keep out dirt and water
Maintenance free