CeramicSpeed PF4630 OSBB 30mm Spindle BB


due to covid restrictions product availability may be delayed by up to 30 days

PF300SBB / PF46X62 – All 30mm crank spindles

SKU: BELCERPFOS_10142 Categories: , ,


OSBB is the acronym for Specialized’s OverSized Bottom Bracket. It features a 46mm diameter and 61mm width shell. As it is unique, it requires a unique bottom bracket to mate BB30 cranks to it.

The cups come installed with one of two CeramicSpeed bearings. The Standard Bearing has ceramic CS balls and hardened-steel races. The Coated Bearing has the same balls running on hardened-steel races with a 3-micron thick metallic coating making the races harder and smoother, increasing service life and reducing friction.

Additional information


– You can cancel the purchase at any time, just click on "cancel" and you will not be charged anything at the deadline. – The amount that will be put on hold on your credit card will be the starting price but you will be charged the lowest amount reached by the offer when it expires.




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