MegaExo is the FSA brand outboard BB.


99% it's English threading. if you're uncomfortable email bikesdirect.com for any specs not on the website.

just pick the level of Hollowtech II that you want and do a Google or Ebay search for the best price, along with the proper tool if you don't have it already.

i like:



the nice thing about cartridge/external BB's vs. loose ball is that (for many riders) it's an install-abuse-replace item as they are (relatively, $28 for an Ultegra) inexpensive and take about 5min to swap out.