Updated: 16/11/2018. This post explains threaded T47 bottom bracket (BB) standard. Look here for explanation of all the other BB standards. 1. Description of T47 standard T47 is a modern standard with BB cartridges screwed into the frame BB shell threads. Developed by Chris King and Argonaut Cycles companies. Announced in 2015, also known … Read more New threaded BB standard: T47
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