T47: More standards, more problems, or one bottom bracket shell to rule them all?
Years ago, in search of more stiffness, cranks with 30 mm aluminum spindles were introduced. Unlike the steel 24 mm spindles already on the market, those new oversized spindles didn’t work with the established threaded BSA bottom bracket. This led to a new standard: BB30. The BB30 standard involved bearings installed directly into frames and snap rings ...
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