The Kogel Italian Bottom Bracket fits on a classic Italian threaded frame. Featuring ceramic bearings, this bottom bracket is made to run like new for years on end while enhancing your power transfer. This version is designed to accommodate cranksets with a 30mm long spindle including Rotor, 386EVO, THM and SRAM. These strong seals are designed for MTB and gravel riders to keep moisture and debris out. Kogel knows that every pedal stroke is important, and hand makes their bottom brackets to maximize your efficiency.