I'm 6'7" and have a super comfortable bike with 26" wheels on it.

The difference between a 26" and 700 wheel is actually very small (diameter-wise). If your bike is "too small" it is unlikely that switching between those two wheel sizes would make a meaningful difference, all other things being equal.


Changing the seatpost and stem would be the way to go, if you need to make the bike "bigger". Or buy a new, bigger, frame. (Most people on BF.net could easily be talked into buying another bike, I'd wager. )




Edited to add: +1 to the post above warning about switching wheel sizes on your current bike. You'd probably end up quite frustrated and spending too much for too little of a result.