Please tell me what you folks think ?
Since most tri -specific geometry bikes are set up with larger (55t / 42t) or (54t / 42t) time trial
cranks from the manufacturer, they tend to be great for guys with legs like Jan Ulrich, or Lance riding 30+ mph on the flats, HOWEVER, most of us regular people can't push a big ring like that at 90 to 100 rpms UNLESS we are using the middle to larger cogs in the rear. Therefore, the smaller cogs in the rear go un-used unless I'm in my small front chainring, or spinning down a hill.

This is the case on most of my training rides, where the GOAL is to spin at between 90 and 105 rpms, and keep my heart rate between 140 to 160 bpm for x amount of time, say 3 or 4 hours, regardless of the terrain slope. I am contemplating putting a compact crankset (50t /34t) on my tri-bike to be able to stay "in the big ring" and work my way through the entire rear cogset, and
be able to "spin" up climbs, or even do a Century, since I do not have a "standard road bike".

Have any of you guys or ladies put one of these "Tyler Hamilton specials" (compact crankset) on your road or tri bike ? If so, how has it improved your climbing and general riding efficiency?
Also, did you pair it with an 11-21, 11-23, or 12-26 rear cogset?
Did your standard Shimano 105/ Ultegra/ DuraAce front derailleur work OK with this setup, since it involves a 16 tooth differential?