The choice may depend on how low a gear you want. The TA Cyclotourist and Stronglight 99 will take about as small an inner ring as anyone is likely to want. Campy made two on-topic triples I'm aware of, the Campy NR triple with inner BCD about 100 BCD and Campy GS triple with 116 BCD. Theoretically, I think the GS should go down at least to 34T and the NR triple to maybe 30T, but I don't think I've ever seen a ring smaller than 36T for either one. Stronglight 93 can be configured as a triple, but the smallest ring I've seen is 38T although I would think a 36T should be possible. Another common On-Topic triple was Avocet/Ofmega. The inner circle is only a few mm different from Campy NR triple, but smaller Avocet/Ofmega rings were made, I think at least as small as 32T.
REgards,
Jerry Moos Big Spring, TX
"David G. White" <whiteknight@burlingtontelecom.net> wrote: Chip,
I'm not aware that any on-topic Dura-Ace triple cranksets were ever made. I've seen one 1st generation Dura-Ace triple conversion that worked fine. It's not too hard to do since it uses a smaller BCD than Campy. If I recall correctly it simply required using proper spacers and bolts -- maybe from TA? -- to add the third ring (and a wider BB, of course). Otherwise the most common on-topic triples are TA, Stronglight and Campy NR -- all of which are very good.
Cheers!
David
David G. White Burlington, VT
Chip Barker wrote:
> My Bob Jackson has a Phil Wood BB with the square shaft end and I want to
> fit a high end 3 ring crank set that is period appropriate. I'd like
> suggestions on particular Dura-Ace or equivalent Campy models I might use. I
> know Campy changed the configuration of their BB ends a t some point so the
> "newer" versions won't seat on my square taper Phil BB. Any suggestions will
> be appreciated.
> Chip Barker
> Poulsbo, WA USA