Originally Posted by
jimc101
Why? you can't by high end 10 speed anymore (on new bikes, and when stock is sold out in stores that will be it), and 11 speed is cheaper new than 10 speed was.
That's just not true. Right now, 9 speed parts are available for a small fraction of what 10 speed and 11 speed parts cost. Within a couple of years, this will be the situation for 10 speed parts.
I just did a 9x3 build because the parts cost me about half of what a 10x2 or 11x2 build would have, and the functionality is better - wider overall gearing range, along with narrow spacing of the gears.