A suitable choice for anyone replacing a worn ISIS bottom bracket on a bike with a 68mm BSA-threaded shell and 108mm spindle requirement.
This ISIS bottom bracket cartridge is a direct replacement unit for a compatible threaded frame and crank setup. It fits a 68mm bottom bracket shell, uses a 108mm axle, and is designed for the ISIS drive system. The BSA/BC English thread is the familiar 1.37-inch x 24 TPI standard used by many threaded bottom bracket shells.
Inside, double-sealed bearings help keep everyday grime and moisture away from the bearing assembly, while the hollow Cro-mo axle provides a durable spindle design without unnecessary bulk. Cold-forged steel cups provide a robust threaded interface, with phosphated cups and an anodised sheath adding surface protection.
Before ordering, check all three essentials: your frame must have a 68mm BSA/English-threaded shell, your crankset must use ISIS, and the required spindle length must be 108mm. Threaded and press-fit bottom bracket systems are different standards, and shell width and spindle length need to match the crankset and frame. Once compatibility is confirmed, the cartridge is designed for easy installation with no adjustment needed, helping you get the bike back in service with minimal fuss.
ISIS crank compatibility
Built for cranksets using the ISIS drive system, so it is a focused replacement rather than a universal bottom bracket.
68 x 108mm sizing
The shell width and axle length are clearly defined, making it easier to match the cartridge to your existing setup.
Double-sealed bearings
Sealed bearing cartridges help limit the entry of grime and moisture during regular riding.
Hollow Cro-mo axle
The Cro-mo axle construction is designed for dependable everyday use, with a hollow format.
BSA English threading
Uses BSA/BC 1.37-inch x 24 TPI threading for compatible English-threaded frames.
Cold-forged steel cups
Strong steel cups provide the threaded mounting interface and are finished with phosphating.
No adjustment needed
The cartridge format is designed to fit without bearing adjustment, reducing installation time and setup complexity.
General
Materials & construction
Dimensions & weight
Compatibility
Features
