Building a fairly light frame that will last a fairly long time is fairly easy. Hanging a bunch of light and durable parts on it is a little harder. A frame comprises - what? - like, 20% of total bike weight? With that in mind, it's a pretty stupid place to try to save more, relatively speaking, than 20% of the total bike's weight. While all the parts contribute to the whole, for sure, most of the weight savings that results in a 13-lb bike derives from the parts, not the frame.muscleendurance said:"The Eagle frame.. comes with a 25-year warranty" - cyclingnews.