Claim: The British Standard Cycle thread runs at 60 degrees which was originally used with bicycles and motorcycles, and the cycle thread in ​⁄16 and ​⁄2 inch sizes also come in 20 tpi and 24 tpi options.
Evidence: Unlike other major British imperial thread standards (British Standard Whitworth and British Standard Fine) the thread runs at a 60 degrees rather than a 55 degrees angle. It was originally used with both bicycles and motorcycles. Cycle thread in ​⁄16 and ​⁄2 inch sizes also come in 20 tpi and 24 tpi options.