I know it's not as sexy as a 2x10 build, but have a 9spd XT rear deraileur, 9spd chain, and XTR shifter pods already.
Here the scoop:
I've been single-speeding pretty much exclusively for the past several years and run 34x20 in the off-season or on hilly stuff and 34x19 the rest of the time. In the winter or when I have mechanical issues, I break out my Moots which has a 1x9 drivetrain (34t front, 11x34 rear). There is nothing that I cannot climb with that gearing (that is that others can climb) so I'm good at the low end with the 1:1 gearing, BUT I want to go faster.
So I am building a Specialized Stumpjumper 29'er I have laying around and would like to have 2x9 gearing. I intend to use the same rear cassette (11x34), but need to figure out which two chainrings to buy for the front and there are alot of options:
It seems like the 30x44 would be the logical option. Am I missing any downside on that choice?