I'm sorry, but I disagree. The point is, that every hub could have a slightly different spacing, so once you replace the wheel, you'll need to re-allign the brakes and gears.
Yes, that is exactly what I am trying to avoid, I want a spare wheel to quickly change from MTB to Trainer tire, would not be that useful if I need to align everything back again.
I am attaching the pics, there is nothing written down on the hubs, I hope they will be recognizable. I paid for the
bike 350.00 on some nice sale, so I don't expect those to be mid-level hubs =D
Wheels are 29"