Bottom Brackets

Bottom Brackets

The bottom bracket (bb) is the bearing assembly that sits in the bottom of your frame and on which the cranks spin. It’s the hardest working of all of the bearings in your bike and there are many different standards to suit different cranks and frames. While almost everyone has shifted to large–axle, press–fit bb’s we stiff have a soft spot for the reliability of a square-taper, threaded bb.

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