Updated: 09/09/2020. This post will give a short overview (list) of threadless (press fit) BB standards. For each BB standard there is an overview intersection of BB cartridge and frame’s BB shell where BB is inserted to, followed by it’s dimensions. Look here for explanation of all the different BB standards. BB30 Shell width: 68 … Read more
Updated: 22/11/2020. This post will explain bottom bracket compatibility. Which bottom brackets (BBs) can be combined with which crankset standards. Posts that explain in detail the history and construction of each BB standard can be found here:1 History and threaded BB standards2 Threadless (press fit) bb standardsT47 – a new threaded BB standard Note: crankset … Read more
Updated: 16/11/2018. For basic terms explanation and history of BBs, as well as threaded BB standards, read this article: Bottom bracket standards – 1st part. BBs with press fit (threadless) cups usually use cranksets with the spindle (axle) attached to the right crank arm. For installing, and especially for replacing, BB cups, special, expensive tools … Read more
