Originally Posted by
ColinL
Cyclocross tires probably will fit on a 26" bike because the diameter is small. I am guessing that a 29x2.0 would not, but it depends heavily on your fork crown and rear brake bridge.
A 2.0 would never fit this frame near the BB. A 1.5/38c nobby would be the maximum giving a few mm clearance. When I built the bike rigid 29er forks weren't easy to get (only a niner fork) whats coming out of china now has changed things.