Bottom Bracket Tapers

The square taper bottom bracket is familiar to any and all that have worked on a bike in the past 30 years, it is by far the most common type to encounter even as some newer interface designs have all but eliminated it from the performance road and mountain bike market. Contrary to first look, not all square taper bottom brackets are created equal—there are two different standards used to dictate the dimensions of the taper. While the difference between ISO (International Organization for Standardization) and JIS (Japanese Industrial Standards) specifications seems trivial it is certainly worth understanding if for nothing more than impressing your friends with your vast cycling knowledge.

Read the entire article.