Originally Posted by Darth Lefty

Will it work? Mostly a matter of brake reach as previous guys said. Same as a 650b conversion, only less so.

Disadvantages...
Paying for all the new stuff
Bike runs ~4mm lower. Pedal strike?
If you have a kickstand on a bike that started with 630-32 and you put on 622-28, it might get tippy - this happened on my Super Sport, which has a built-in stand.

Advantages...
wheels that come with cassette hubs
nigh-infinite skinny tire selection
possibility of bigger tires (if you have the clearance for the width)