Originally Posted by
jar351
Thanks for the info, Southpaw. It looks like I mis-measured. 320mm from the axle center, I've only got about 41mm of width. I could move the axle further back into the dropouts, but most likely not enough. Doesn't look good for the Hetres.
Agreed. That still leaves you choices in the 38mm range (pari motos, Lierres, and the Soma B-lines (skinwall, not hypertex)). Looks like you have enough BB height for a smaller 650B tire, but your clearance will still be very tight. (5mm less clearance than I had, and if you go with a tire that is 4mm smaller, that still leaves you with less net clearance than I had to work with).
You could always go with Cypres at 32mm, but then that sort of defeats the purpose of conversion, IMO. And you might start running into BB height issues.