Great storage solution
This is one of the best storage solutions for bikes that I've run into. It holds the bike up by the tires, which means it won't work if your bike has a flat or is too wide. Saves my bike's paint and/or wheel from pressure on the rim/spoke from leaning it, using hooks on the frame, or hanging it by the wheel.
As far as tire limits go, the 2.4" estimate seems spot on. My 2.35 Rampage, 2.35 High Rollers, 2.35 Nevegal, and 2.3 Bronson have no problems fitting in (26" tires). Oddly enough, my 29er's Panaracer CG XC 29x2.25 tires won't fit smoothly. They can be wedged in, but the rack needs to be anchored down to pull the bike out. Freaky wide tire maybe (tubeless on Flow rims)?