Every sub-forum here has a description of what it's about. This is the one for this sub-forum.
Fitting Your BikeAre you confused about how you should fit a bike to your particular body dimensions? Have you been reading, found the terms Merxx or French Fit, and don’t know what you need? Every style of riding is different- in how you fit the bike to you, and the sizing of the bike itself. It’s more than just measuring your height, reach and inseam. With the help of Bike Fitting, you’ll be able to find the right fit for your frame size, style of riding, and your particular dimensions. Here ya’ go…..the location for everything fit related.
Though I firmly believe that the sub-forum should be called "Fitting You to Your Bike". Or something that isn't as ambiguous as it is now.
While different size wheels may help you fit on the bike, the information about changing the wheels on that bike to a different diameter is better suited for the
Bicycle Mechanics sub-forum as more people that are mechanic's and DIYer's will be in that sub-forum to notice and answer your question. Though some do come here and I think you got a mechanic and me a DIYer to respond here, wouldn't you like to hear the views of more mechanic's and DIYer's so you can pick what you thing best for you?
I don't think the change in wheels will throw the sizing of the bike off for you. It likely will make the bike more sporty handling. So if you don't like sporty handling, which some people call twitcy, then that's a consideration for you.