a 20 with a decent sized tire anything else youd have to raise it and put a low profile on it which wouldn't last long on a heave deville
can 22's fit on a 1998 cadillac deville without modifications?
Not without modification
NO
yes they can you can put them on without lifting and they will not rub
20 inch without any mods.
Duralast 620K6
To disarm the factor alarm on a Cadillac Sedan Deville, place the key in the ignition and turn it slightly without starting the car. Leave it in that position for 10 minutes and turn the car on.
Start by disconnecting the battery.
Press the trunk button on the dash board or the remote key fob
22" rims will fit without a problem. With a slight lift you can fit 24"s.
It depens on how much lift is on it, but without a lift you should comfortably be able to fit 33x8 sized tires on them with little or no rubbing.
You can reset the theft system in your 1994 Cadillac Deville by putting the key into the ignition. Turn the ignition to the auxiliary position, without starting the engine. Leave it in this position for 30 seconds.