Originally Posted by cs1
I think it's called a 29'r.
Seriously, 700C wheels probably won't fit on your present MTB. IMO, strip the bike and sell the frame, fork and wheels. Then just put your parts on a new 29'r frame/fork. Don't forget the new wheels. Good luck
Have you actually tried? My evidence:
I have a 26" rim fitted with a 2.1" Velociraptor tyres and measured it against a 700C rim with a Vittoria Rubino tyre and... the outside diameters are about the same. These are unbuilt wheels, but I like to fit the tyres until I get the spokes to make sure everything fits.
Then I dropped a spare MTB fork across the axle of a 28"
wheel with tyre and... it fitted just fine.
Then I popped the 700C wheel
from my touring bike into the dropouts of the MTB frame on the workstand and... it fitted.
All fittings were with plenty of clearance.
The issues are not so much clearance around the forks, chainstay and seatstay, but the placement of the brakes. This is really a non-issue if you are talking about discs. Surely.