The Shimano BB-UN26 73mm / 113mm Bottom Bracket is a dependable square-taper cartridge unit for bikes using English-threaded frames and JIS cranksets. 

Key Features:
  • BSA/English threaded frame interface.
  • 73 mm bottom bracket shell width.
  • 113 mm spindle length.
  • JIS square-taper spindle interface for compatible cranksets.
  • Fits JIS square-taper cranksets.
  • 1.37-inch bottom bracket shell internal diameter.

Who is it for?
Riders and mechanics servicing bicycles with 73 mm BSA/English threaded shells and JIS square-taper cranksets.
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