I posted this question in a reply to a thread below, but I think it has gotten buried. Shimano.com lists the Dura Ace 7700 model crank as the "Triathlon" model. TriBriGuy replied that the 7701 is the tri model crank. Is the difference between the two only the stock chainrings they come with, or is there actually a difference in the spiders? Basically my question is if I want to run big chainring combos (42/55 or 44/56) for 650c wheels will either crankarm work?

Thanks

Sweet