The space saver spare used in our cars was a collapsible tire. The other choice was a plain steel rim with standard tire, and I believe it was possible to upgrade the spare to a matching Rally rim if so ordered. The space saver rim is also a narrow rim, I believe 5" width though I do not have one mounted. A 75 profile is probably on the wide side.

If using a standard tire it would be best to match tire heights and style (radial, bias, belted) for safety.