The wheel size should be on the wheel. It is if alloys are fitted.
My 2002 had the 205/60/15 alloy wheels and I used Avon ZV7 tyres. The steering only felt heavier when parking. While driving no problem. No power steering. 21/22 psi pressure all round. The wheel spec was cast into the wheel along with “Morgan Motor Company”. Not sure about wire wheels though.
