@DaveK 26671 wrote:
Actually the newest road disc frames seem to use 135 as their rear spacing, so I think that move might happen sooner rather than later.
For discs it seems like a done deal. You don’t yet see many discs on racing bikes, though, and racers tend to hang on to each size step much longer than MTBs (where people are already running with 150s). There are cogent arguments why you might want a narrower rear hub on that sort of bike, and it may be that the evolution for racers runs the other way with narrower hubs and asymmetric or bladed wheels or something.