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This article will discuss how to remove and install bottom brackets used in threaded shells, including three-piece cranks, threaded "thru-spindle" external bearing cups, and bottom brackets used in T47 shells. For the two-piece crankset, there is a left and right arm, but the spindle is attached to one of the cranks. The spindle passes through the bearings in the bottom bracket shell.
Description Forged steel spindle. Steel cartridge body and left cup. Does not include crank bolts.
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