Join Date: Dec 2005
Location: Ashland, VA
Bikes: The keepers: 1960 Raleigh Lenton Grand Prix, 1968 Ranger, 1969 Magneet Sprint, 1971 Gitane Tour de France, 1973 Raleigh Tourist, 1973 Lambert, 1973 Schwinn Super Sport, 2 - 1988 Rossins, a third Rossin frame and a '79 PX-10 frame to be built
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The easiest solution is to use the original French cups. Bearings are no big deal, the good old standard loose balls will work just fine. To this add a '5' (Italian) dimensioned spindle, since French cups are usually a bit thinner. Now, you can probably do all the math on chainlines, etc., to figure out the proper spindle length, but it's still an arcane science, so the easiest solution is to pick up a couple of different used spindles and just try them to find which one fits the best for your planned crank.
If you're planning on using a French crank (say, Stronglight), it might be a bit more direct to find an actual Stronglight, etc. spindle in the proper size. On my end, the local LUsedBS sells me spindles at $1.00 apiece, so I just have a collection of them on the shelf.
"No wonder we keep testing positive in their bicycle races. Everyone looks like they're full of testosterone when they're surrounded by Frenchmen." ---Argus Hamilton