Originally Posted by
Bandera
That would not give the OP the 42mm chainline he needs for FG/SS, but he has it figured out:
"So...for a ~42mm chainline I would probably need a 103mm BB (112mm - 4.5 - 4.5)!"
-Bandera
Give it a whirl, but at 103mm I'd bet the inner portion of the arm near the spindle rubs on the BB cups. I tried a shorter spindle Stronglight and that's what happened to me. But I didn't measure chainline as it wasn't rideable.