Originally Posted by
horribleoldman
not quite true, there is a trickle down effect but 105 lags a few years behind DA/Ultegra. This can often be seen with the difference in hood shape between DA and 105. DA also has ti parts, and more exactingly machined bits.
Very true but the trickle down is technology only....I dont think a 105 ever had the same parts as 600 and 600 never had the same parts a Dura Ace.