Inflating wheelchair tires to 90 PSI
The CFM of the compressor is the volume of air the compressor can move at the rated pressure. Your chair tires have a tiny volume just about any compressor on the market can handle them.  The peak or max pressure is what you need to look at.  The peak or max pressure is the value the compressor shuts down at for safety. You want this pressure to be higher than your needed pressure for losses in the hoses and the bit you loose when disconnecting the air fitting. All the pancake compresses I know of (even harbor freight) will have sufficient SCFM , if the max pressure is 125 this should more than enough to reach 90 psi on your tires once the tank fills without having to run longer than to fill the tank.