Because it doesn’t come in the size you need?
I suspect, like me, many see that as a problem solver. You have a frame you might not keep forever with a French, Swiss or some other weird BB thread you can use the threadless. Then you are not wasting a lot time and spending more for that funky BB
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk