A Chin Haur CH52 sealed cartridge bottom bracket suitable for bicycles using a conventional square-taper crankset and 68 mm English-threaded bottom bracket shell.

The unit is clearly marked CH52, 68 x 111L EN and BC 1.37 x 24T, identifying it as a 68 mm English/BSA threaded unit with an approximately 111 mm square-taper spindle.

These cartridge bottom brackets were fitted to a wide range of road, touring, hybrid and mountain bikes and can be particularly useful when repairing or restoring an older bicycle where a traditional square-taper chainset is being retained.

Specifications

Manufacturer: Chin Haur
Model: CH52
Type: Sealed cartridge bottom bracket
Interface: Square taper
Shell width: 68 mm
Spindle length: 111 mm
Thread: BC 1.37 x 24T
Thread standard: English / BSA
Marking: 68 x 111L EN
Colour: Black / silver
Quantity: One bottom bracket

Condition

Used vintage component showing normal signs of previous installation, age and workshop storage.

There is cosmetic marking, surface oxidation and evidence of previous fitting around the cups and body. Please examine the photographs carefully for the exact condition.

Sold as a used component.

Compatibility

Designed for bicycles with:

68 mm threaded bottom bracket shells
English/BSA 1.37 x 24T threading
Square-taper cranksets requiring an approximately 111 mm spindle

Bottom-bracket spindle length affects chainline, so buyers should check the requirements of their crankset before ordering.

Sorcha Rosa’s Comment

Square-taper bottom brackets might not be exciting by modern standards, but they’ve kept an extraordinary number of bicycles on the road. This Chin Haur unit is exactly the sort of useful workshop component that can be difficult to find when you’re repairing an older bike. If the dimensions match your build, it deserves to go back into service rather than sitting on a workshop shelf.

Sorcha Rosa

English Thread

Chin Haur CH52 68 x 111mm Square Taper Bottom Bracket – BSA/English Thread