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OSBB Ceramic Bottom Brackets

F1 Ceramic BB. F1 Ceramic is a worldwide leader in ceramic bottom bracket bearing technology. We've been making ceramic bottom brackets since the early 2000's and have provided ceramic bottom brackets to racers all over the world!

Each and every ceramic bottom bracket is 100% Handbuilt in the USA at the time you place your order.

In this category you will find our OSBB bottom brackets designed to fit Specialized's OSBB frames.

Specialized has two versions of OSBB, based on their measurements at the BB shell.  First is their 42mmx68mm, essentially BB30.  The second is 61/68mmx46mm, essentially PF30.  We have both below.  You will need to measure your frame's BB shell in both width and inner diameter to determine which version you have.