YST BB-993 Threadless Cartridge Bottom Bracket 68mm Shell

YST BB-993 Threadless Cartridge Bottom Bracket

A great solution for repairs on bicycles with square-taper cranksets where the bicycle frame has damaged or stripped threads in the bottom bracket.

• The patented design YST BB-993 threadless cartridge unit threads to itself and has bevelled cups for a snug fit.
• Durable Steel cups, body and axle with sealed bearings.
• Compatible with 68mm English type BB frames.
• Requires ‘UN’ type BB spline tool for fitting. e.g. Ison part number: 2FX27
• Torque for tightening the bottom bracket is 400kgf-cm to 500kgf-cm (40-50Nm)

Practical solution for frames with:

• Damaged threads
• Worn-out BB shells
• Retro builds needing an easy-to-install, reliable bottom bracket.

Designed for 68mm English-threaded (BSA) shells.

• This threadless design fits snugly into the shell using compression and steel end cups
• Perfect for restoring classic frames or simplifying bottom bracket maintenance.

Features:

• Sealed cartridge bearings
• Provides smooth, consistent performance with minimal maintenance.
• The steel cups offer strength and durability,
• Square taper interface ensures compatibility with a wide range of cranks.