I know nothing about this topic, but find this hard to believe. However if you e-mail Cannondale through their web site, an actual inteligent human being will take the time to give you a very detailed answer. I once e-mailed them a question and two people e-mailed me with a response. I even replied to the e-mail and they answered my reply as well. It seems as if their customer service is excellent from this limited sample. However if you prefer, posting it on this web site is a lot more fun as the anti-aluminum snobs will start a fight with the cannondale geeks and degenerate into name calling.