alienator said:
Where is the evidence that a Campy crank on a Campy drivetrain is settling for less?
Okay, you're apparently too young to remember when "compact"/(also, "Alpine") gearing wasn't considered a viable option for those who aspired to being a so-called 'serious' rider because using a 110BCD-or-similarly-small spider resulted in 52t-or-larger chainrings which flexed too much in the minds of those who advocated "regular" ROAD cranks ...
I would suggest that ONE reason that "compact" gearing is viable, now, is because 8-/9-/10-speed (Shimano) chainrings are thicker than the old 5-/6-/7-speed chainrings of yore ... and, the thicker chainring has resulted in an acceptably stiffer chainring ...
Shimano's latest DA & Ultegra cranks with their supposedly stiffer spiders & chainrings AND derailleurs is further testament to Shimano's ongoing efforts to mitigate the inherent flaw (i.e., "dwell") in their STI shifter design.
Because Campagnolo shifters are so efficient, many people don't realize that the shifting on their Campagnolo drivetrains can be marginally better by choosing/using the 'technology' which Shimano has developed to compensate for the flaw in the mecahnical design of their STI shifters.
Of course, Campagnolo's unnecessary
answer has been to narrow the gap between the chainrings (and now, cogs) AND to redesign the parallelograms on their derailleurs.
Least we forget, ramping-and-pinning helps Shimano shifters but (based on my observation) ramping-and-pinning is completely unnecessary with Campagnolo shifters ... and, as I observed in the past, I realized that because I use Campagnolo shifters I could give
a second life to some of my older, "thin" chainrings on my Shimano/etc. cranksets.
The long-and-the-short of it is that Shimano cranks-and-derailleurs are marginally stiffer than Campagnolo's AND Shimano's DA & Ultegra chainrings have more efficient ramping and/or pinning which will further expedite the already superior shifting of Campagnolo's shifters ...
that may matter to some people [e.g., non-sponsored racers & wannabe racers], and not matter so much to others ...
Personally (again, because I use Campagnolo shifters), I'm content with using EITHER Campagnolo OR Shimano/
[almost any] cranks + an outer chainring from almost ANY era.
TODAY'S ASSIGNMENT. We already know that the lack of trim is a design flaw in SRAM's left shifter ... someone who use SRAM shifters needs to mount an older, non-ramped/non-pinned outer chainring on their crank & report back on how well it shifts ... or, doesn't!?!