Originally Posted by
FBinNY
Depending of the fork and chainstay clearance it's possible and can work out very nicely. The only trick is getting the brakes to reach. But you're in luck, the folks at Mavic make an
adapter expressly for this purpose.
I've seen folks do this conversion using the Mavic adapter, and it works out great.
This is all correct, and in addition, if you use hub brakes (disc brakes, for instance), you won't have the reach problem, at all.
In theory, there is no geometry difference going from a really fat 26"-tire wheel to a skinny 700C-tire wheel. Ride quality, of course, will differ greatly.