Check this thread out, some good links to wheels other people have fitted. https://www.copenworld.com/vb3/showthread.php?t=660&highlight=alloy+wheels Also have a quick check here. https://www.copenworld.com/vb3/showthread.php?t=468&highlight=wheel+size
Hi Not sure where I got all this information, but this is what I had listed about the wheels and tyres. Copen 2003 to 2006 Tyres Tyre pressure: 35 PSI front and rear Torque: 113 Bridgstone Potenza RE040 165/50 R15 73V Achilles Economist XL (75V) Nankang NS2 Toyo Proxes R888 Conti Sport Contact 3 Wheels Wheel: 15 x 4.5 (15 x 5.5) Offset ET: 45 (35-45) (38-45) PCD: 4 x 100 (4 x 3.94 inches) Dia CB (centre bore): 54.1mm (56.1) Fitting: 12 x 1.5mm Hope this helps KS