Originally Posted by TiHabanero

As explained to me at the time by the Giant rep, they produced some basic frame platforms that received other brand name treatments and parts spec. The AT 750 was their top tier frame. Again, this information came from the rep in 1988, the had the AT 720, 730, 740 and 750 frame series. The difference was tubing. The 750 was full cro-mo TB. I had a co-worker that raced the 740 frame quite successfully. I raced, but sucked at it, and had the 740 frame as well. The 750 frame has failure issues due to the thin walls, and was dropped by Giant within a 2 year cycle. For some reason I want to add here that the tubeset was based on the Ritchey go light as possible theme, but the temper of the tubes they used was incorrect. They were light and fast, just pushed the envelope too far.