Cadence - I don't think Campag make a 12-29. The highest for a 12 inner, so far as I'm aware, is a 25!!!
I've been using a 13-29 for quite some time with a medium cage as part of my triple rig on my 2nd bike and have experienced no problems with the shifting. The rear mech is not the long cage either, but it works well on the 30 inner ring. Previously I had used a 13-29 combo with a double 39-53 set-up. Again, no problems shifting.
When would you use a 53x12 apart from going down a climb? If you haul that along the flat well chapeau!!!
Thanks KB: That's why I posted the ?....I would have to set it up individually, I have heard of riders using that setup. I'd like the 29 for climbing range, and I do use the 53/12, I like it!
I don't want the triple setup, if I can avoid it. If the 12/29 is not possible, I'd go 13/29, double front. But I'd like to keep the 12 w/o spacing out too much. On the Record, I'm pretty sure one can go 11/26, short cage, or 11/29 (double front) on the medium cage, so a 12/29 should work, right?.
Thanks Rogue, if someone can suggest the cogs, I'd like to try it.
Right now I have 12/13/14/15/16/17/19/21/23/26....I'm wondering...maybe 12/13/14/15/16/18/21/23/26/29, but 18/21?