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.
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!
Alloy construction. Installs with standard 20-tooth spline bottom
bracket cup installation tool.