The CeramicSpeed Coated Gravel Bottom Bracket ensures smooth and silent function of your crankset along with easy connection to the frame. The bearings are coated, improving efficiency and lifespan. The bottom bracket also features dust covers to keep debris away, maintaining smooth function. This version is designed for PF30 shelled frames like Cannondale, Ventum, and Niner. It pairs with 30mm spindle spindle cranksets. The CeramicSpeed Gravel Coated Bottom Bracket is the best way to maximize performance and pedaling on your gravel adventures.