PROBLEM SOLVER Up-cup, Euro BB 68mm to 73mm up cup.

Description The Problem Solvers UP-CUP #54 was designed by our PD & D team as a Shimano compatible non-drive side bottom bracket cup for Shimano UN54 cartridge square taper spindle bottom brackets. Product uses: The UP-CUP #54 can be used to replace or UPgrade the plastic non-drive side CUP found on Shimano UN54 bottom brackets. It provides better durability and reliability for discerning square taper bottom bracket users and retro-grouches. Never worry about a cracked or broken plastic cup again! Technical details: Alloy construction. Installs with standard 20-tooth spline bottom bracket cup installation tool.