20 inch rims are stupid, plain and simple. The brakes, suspension and tranny are not engineered for them, and while you look good to others that wish they had or do have 20 inch rims on a caprice, to everyone else you look like you spent all you $ on rims and gold teeth caps instead of a education. Only thing worse is 20 spinners. Not to mention they are unsafe, (for the previously mentioned reasons; but further- what type of engineering tests did you do on the rim design to insure they will withstand the forces the car will put on them? are you a degreed mechanical engineer?) and NO just because the bolt pattern is 5 X 112 do all w126 rims fit w123's. You have to take into account the rim offset- if you dont understand what offset is, which seems clear (you custom built rims and they don't fit your car so you need to add spacers?????), do some research. Now, on the other hand, it's a free world- do what ever you want, I could care less- but making your car less safe can and does impact others on the road and in life. It's the same as helmet laws for cycles- I don't care if you die from head injuries- but when you dont die and cant pay for medical care and wheelchairs and all the rest that goes with life altering injuries , guess who does pay? The rest of us for your lack of thinking ahead.