FSA Alloy Cup JIS Bottom Bracket

This model is specifically designed for frames with an Italian threaded shell, which typically measures 70mm in width. Please verify your frame's threading before purchasing, as this will not fit standard BSA (English) threaded shells.

This bottom bracket uses a JIS square taper interface. It is compatible with any crankset designed for the JIS square taper standard, but it will not work with modern external bearing or splined cranksets.

The correct spindle length is determined by your specific crankset model, not the frame. You should consult the manufacturer's specifications for your crankset to ensure you select the correct length—110.5mm, 113mm, 118mm, or 122.5mm—to achieve the proper chainline.

This unit features double snap seals designed to keep moisture and grit out of the bearings. While it offers solid protection for general riding and commuting, regular maintenance is still recommended if you frequently ride in heavy rain or muddy conditions.

You will need a standard bottom bracket tool compatible with the splines on the alloy cups. Because this is an Italian threaded unit, remember that the drive-side cup tightens clockwise, which is the opposite of a standard English-threaded bottom bracket.