Considering getting some steel ones for my winter tyres. And yes I know it's the wrong time to look
I already have the tyres, which is a bit annoying, so they need to fit. Rim diameter is obviously important, as is the number of bolt holes and the circle diameter - this is PCD isn't it?
Then the depth of the rim has to be the same, I presume? How is this quoted? Anything else that needs to match?