I have a post PBP project where I will be building up a new recumbent bike from a frame set. At the same time I have an old mountain bike that is just sitting in storage as the frame is dead. The mtn bike has xtr 9 speed bling on it (bought ex demo) and I'd like to put the drivetrain on the new frame. I believe the crankset is XTR M970 hollow tech II and sitting on a 73mm BB MTB. Is it possible to fit this crankset on a road BB 68mm shell with some kind of spacers or is that fantasy? The outer ring is 44 teeth but I presume I can fit a 46 or even 48 ring for a bit more top end for the road?
Seems a shame to give this drivetrain away only to spend loads on a new drivetrain for the new project..