Bicycle ISIS Crankset & Bottom Bracket – Tech Tips – This Old Bike #usedbikes #sports #bicycle

A 3-piece bicycle bottom bracket is a type of bottom bracket that is made up of three parts: the crank arms, the spindle, and the bottom bracket cups. The crank arms are attached to the spindle, which is then inserted…

Published: February 18, 2026

A 3-piece bicycle bottom bracket is a type of bottom bracket that is made up of three parts: the crank arms, the spindle, and the bottom bracket cups. The crank arms are attached to the spindle, which is then inserted into the bottom bracket cups. The bottom bracket cups are then threaded into the frame of the bicycle.