Originally Posted by
dddd
You got yourself metric SWISS threading going on with that Torrot frame, nothing French about the bb threads.
Yeah, still metric, but with superior left-hand threading on the driveside.
The frame maker either ordered the bb shells with Swiss threads, or with no threads (and tapped them themselves).
I've "forced" an English-threaded BB-UN72 bottom bracket into a 1979 Peugeot's Swiss-threaded frame, but it took considerable back-and-forth action with a long wrench to work it in fully (the cups being aluminum, no alteration to the frame's BB actually occurred).
I don't think that it would have worked using a bottom bracket having only holes for a pin tool instead of robust splines like the Shimano BB.
I see...Got myself I tough piece of gruyère... So I won´t be able to use the whole Zeus crankset I've already bought because it is french (right-right)
What aluminum cups BB will you suggest me? The Torrot has a 130 mm distance between dropouts and it came with double chaingring (53/42) with a 5 speed freewheel.