Your new ride is stiff, supple, and reliable with its new T47 bottom bracket shell, and you didn't skimp when it came to getting a smooth rolling Chris King BB, but don't forget to throw on your Chris King Conversion Kit #27 before you slide on your cranks, ensuring you have a smooth and snug fit for years of riding ahead. These adapter cups snugly sit in between your spindle and bottom bracket, creating a barrier that boosts smoothness while reducing any wiggle room in your pedal stroke. Its ideal for setting your ThreadFit T47 30x bottom bracket up to ride with a 30mm road crankset, like Easton or White industries, so you can take on miles of cobbled classics and with the stiffness of your crank carried through to your ride.