Originally Posted by
DiabloScott
Yeah, I think that's pretty much accepted as fact. Although there's a range of dent-resistance based on wall thickness, aluminum tubes are generally thinner than other metal tubes used for bikes, and some aluminum tubes are thinner than other aluminum tubes.. Carbon fiber doesn't dent exactly, but it can crush in localized areas.
Not sure where you got this idea. Aluminum tubes have thicker walls than lightweight steel tubes in every bicycle application I have seen. Need proof? Most tubing manufacturers publish tube dimensions - see if you can find a lightweight steel tube with a thicker wall than any aluminum tube. Failing the time to do research, cut the down tube in half on any aluminum and any steel bike... the steel tube will have walls thin enough that you could use to give youself a punch biopsy of one of your nipples, but the aluminum will have thick walls that you wold have trouble using as a cookie cutter.