More questions on close-ratio triples

I'm building up a replacement for my old OCLV, which will get a triple
crank with 30/39/53 or 30/39/50 and probably 13/25 cassette at most,
or perhaps even 13/23. I wonder if I can use a Campy 'medium' cage
since I'm not wrapping many links more than a compact rig. The max for
a compact rig has to be at least 13*29 with a 34/50 which is equal to
the chainwrap on the 13/25 with 30/50...so will it shift well with a
triple front derailleur and "only" a medium cage rear?

IIRC, the medium cage is rated for 29 rear, and I cant' find the
chainwrap specs on Campy's site.

In article
,
Chris M wrote:

I'm building up a replacement for my old OCLV, which will get a triple
crank with 30/39/53 or 30/39/50 and probably 13/25 cassette at most,
or perhaps even 13/23. I wonder if I can use a Campy 'medium' cage
since I'm not wrapping many links more than a compact rig. The max for
a compact rig has to be at least 13*29 with a 34/50 which is equal to
the chainwrap on the 13/25 with 30/50...so will it shift well with a
triple front derailleur and "only" a medium cage rear?

IIRC, the medium cage is rated for 29 rear, and I cant' find the
chainwrap specs on Campy's site.

53/25 wraps 78
30/16 wraps 46
--------------
32

No, the short cage will not work.
If the large ring is 50, then yes.
You will not run the 30 ring on
smaller than a 16 cogwheel.

I did similarly with a 48-38-28
triple, 12-21 cluster, and DA derailleur.


48/21 wraps 69
28/12 wraps 40
--------------
29

--
Michael Press