The SRAM Pressfit 30 bottom bracket cups with bearings fit frames with a 46mm BB shell internal diameter designed specifically for the Pressfit 30 system. Ceramic bearing provide a little extra smoothness to help get every watt of effort converted to speed. They interface with a BB30 type crank with a 30mm diameter spindle.
The bearings are preinstalled in lightweight plastic cups for easy installation. They use gutter seal technology to prolong bearing life and have an integrated pre-load adjuster. Includes cups with bearings, 2 clear plastic shims, two 2.5mm spacers and a wavy washer.