I belive the frame is Carbon and scandium, I think the chain stays are as well, I will have to look up the rest of the specs. This bike is Italian made and I belive the frame is only 3 lbs. I've heard good things about customer service and their products from various reviews. I like the idea of the chainstays because from what I understand on most soft tails this is where they would break. I will continue to look more maybe a moots YBB? But this frame is about half the price, at 1400.