650B seems to have found quite a bit of traction, with many manufacturers working on platforms for the coming year that utilize the in between wheel size. Interestingly, many riders eagerly awaiting the upcoming 'tweener bikes have yet to actually put time on one, while many more swear that it is simply marketing gurus pulling strings. Who says 26'' wheels, which were just a default size during the mountain bike's inception, are best for the job? Are the downsides to 29ers just too much to ignore? That said, is 650B going to fade away or become the go-to wheel in the future?