Originally Posted by
oneclick
That's a nice looking GS. The crankset is quite a piece, if you wanted to you could remove the chainguard and use the long bolts to make a triple (need a longer axle of course). Check the front mech for cracks, they all do that sooner or later.
if that Stronglight 93 came like the one on my ‘75 Super Course, you wouldn’t need a longer BB spindle/axle. The chain guard occupies the outermost position of a Triple. One need only obtain a 122 BCD chain ring ( no small feat these days...) and arrange as desired. The smallest chainring available is a 37 tooth version currently made by BikeForum member Jon Vara. . See:
122 BCD Conventional Chainring, 37 Teeth