I am doing the same with a Worksman M2600 and so far I have been able to get a 29er(700C) wheel on it with a 45mm (1.77 inch) very aggressive tread Panaracer Fire Cross tire to clear with no issues and without modifying the seat/chain stays. Rim is a Sun Rhyno Lite. I am looking for a 2.0 I am sure the INB measures the same in the rear triangle as the M2600. Worst case I will run a 1.75 rear and a fatter (hopefully 2.125) tire up front like old school BMX.