I'd like to build a wheelset that would work on my cross bike or my 29er, assuming I had disc brakes on the 29er and rim brakes on the cross bike, is there any way I could use a 130mm hub (that fits the dropouts on my cross bike) and make it work on the 29er with 135mm spaced dropouts?
The problems I would see would be that the disc rotors wouldn't line up on the 29er. Could I use spacers to make the hub fit on the 29er or would I need to use a 135mm hub and spread the chainstays on the cross bike? Would either of those options work?