Rather than bury this factoid in an old thread, I thought I'd put it in a new one. The question often comes up as to whether or not the Raleigh Super Course has a standard English/BSC-threaded bottom bracket or a 26tpi Raleigh-threaded bottom bracket. On Sheldon Brown's page on Raleigh threading, he notes that

"In later years, higher-end Raleigh models such as the International, Professional, Competition, Grand Sport and other models built at the separate Carlton workshop used B.S.C. threading, as did models made in Asia and the United States. These bicycles all used cotterless cranks.

Generally speaking, Raleighs that use cottered cranks will also have Raleigh 26 TPI threading for both the bottom bracket and the headset. Although the diameters of these parts are the same as B.S.C., the different thread pitch makes them incompatible. This article will provide strategies for getting around this problem."

Well, to confuse matters, the early 70s Super Course was Carlton made, had a cottered crankset, and a 26tpi bottom bracket. Here's a scan of a Phil Wood bottom bracket retaining ring box (a product that's still available, btw):



Forum member evwxxx confirms that his 1972 Super Course has BSC threading. My 1971 Super Course has 26tpi, so looks like that's a key transition year.

Neal