SRAM English SRAM / Truvativ GXP Bicycle Bottom Brackets
About SRAM - "Incremental enhancements. Perpetual improvements. Revolutionary Innovation. When advancements are continuously made to every attribute of every component, the result is overall performance that is simply second to none. And to real cycling enthusiasts, there is nothing more gratifying then achieving the ultimate ride. And the best part is we just keep making it better. This is what SRAM is all about."
Bottom brackets must fit the frames interface type. For example, an english threaded bottom bracket can only be installed on a frame that accepts english threading.
GXP is a SRAM standard. The cranks have a 24mm spindle on the drive side and a 22mm spindle on the non-drive side.