I am selling a 2008 Giant Trinity Alliance frameset in size Small -- w/ a great cockpit and brakes, if you need them.
I usually ride a 51cm or 52cm road bike, and this frameset fit me perfectly. It's half carbon and half aluminum (not just carbon seatstays -- read on). It's super stiff in the bottom bracket but also very comfortable.
See more on Giant's carbon/aluminum Alliance technology here:
Giant's description of its Compact Road Design sizing is here:
I will throw in Vision aerobars (aluminum or carbon) and brake levers, and Giant brake calipers if you want them -- or I can remove any/all of the components. I'd like to keep them if you don't need them for a build. Choice is yours. The carbon seatpost conveys; it is specificlly shaped for this bike.
I purchased this frameset as part of a complete bike from Hudson Trail Outfitters in 2009 and rode it fast in three or four triathlons each year, for five years. It didn't see many training miles. This bike was never crashed and is in very good shape. I'll rate it a 9.5 out of 10 cosmetically.
I''ll be happy to sell to or answer questions from local buyers who provide a phone number.