The BSA Bottom Bracket for Shimano Road, which utilizes English threading, is a common standard for road bikes with a 68mm width and 34mm inside diameter shell. The drive side also features reverse threading. This kit is compatible with 24mm diameter thru-axle cranks from brands like Shimano, FSA, and Rotor. Customers can choose between two bearing options: Standard Bearings with hardened-steel races and Ceramic balls for low drag, or Coated Bearings with coated, hardened-steel races for longer lifespan and reduced bearing drag. The package includes two threaded cups with bearings, two dust covers with built-in spacers, a spacer tube, all-purpose grease, and a sheet of stickers.