I am looking at getting new forks but want to ‘future-proof’ – can I run my current 26″ wheels in a 650b fork until they break then get 650b wheels? I know it will affect the height/head angle very slightly but I don’t see a reason why it won’t work…….
The only thing that might cause bother- usually the arch flares out around the tyre, so with the tyre sitting slightly further “in” you might lose some clearance. But the odds of that being a problem seem slim
if it’s a true 650b fork it will have increased offset so might be a little twitchy with the smaller wheel.
as said, the x-fusion forks cater for both but I’m not sure if they are inbetweener offset-wise or just sitting on the old 26″ offset and making do.