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any Italian threaded square taper JIS BB's with a 68 shell width?
Sounds like someone has been overzealous with the facer.
As @LWaB suggests, full size Italian bb with a spacer. Shimano unXX should be available in Italian threading.
As for the chainrings, I can't see why there would be a limit on the tooth count of the smaller ring. It looks like they use a threaded insert and a spacer between the inner and outer rings, but you should have all that present on your current set up.
M_V-
Great thank you, this all sounds very positive and seems the Shimano BB route is the cheaper and easier way to go rather than trying to source the Mavic one and then trying to figure out its weird facing.
Its obviously going to be cheaper too so I can get a few different inner ring sizes to try and may get away with the 39 after all, cheers.
user75204
OK, is that good news or bad news? :) Sorry I know nothing of Shimano and JIS
Its surely not going to be as easy as letting me use a Shimano BBUN55 is it, that would be great but seems too easy and simple. If yes from what I can see they come in axle lengths of 107mm, 110, 113, 115, 118 so maybe one of those?.
Edit, hmm all the Shimano BB's I see are BSA threaded but the frame I want to fit this Starfish to is a late 80's Italian bike with Italian threaded BB and a 68 shell width, so I seem like I'm trying to cross streams again, is there any Italian threaded square taper JIS BB's with a 68 shell width?
@MCamb I did wonder about that, maybe a new one will be too fat but a more used chainring will be worn to fit :)....thanks, to be honest I can fiddle with chains, its the BB I'm more worried about at this point.