I have a 5600 105 10-speed triple crankset and BB laying around (50-39-30T). It will be going on a 26er hardtail 9-speed Deore setup (Deore shifters, Deore front der, Deore LX rear der, 9-speed XT cassette).
Any reason why this will not work? Will the 105 road crank/BB have chainline issues or anything? I'm not worried about front shifting as I know that'll work fine.
I know, the 50T big gear is kinda overkill. I just don't see the need to spend the cash on a new 9-speed mountain crankset when I have something on-hand that might work.