I don't really ride off road, but my absolute favorite bike does have 26" wheels, on which I have the fattest Schwalbe Big Apples. I've seen several posts in various subforums here where people said 26" rims and tires are becoming harder to find. I know 29ers and now 650b have been on the rise, but figured quality 559 parts would still outlive me, given all the legacy bikes out there. Has the decline of the 26" wheel really started to pick up speed of late?