I was given this tyre by a friend, but I don’t know much about it and don’t recognise the attachment. The thread is not long enough for my old bike dropouts, what kind of dropouts goes with this?

It’s a wheel – not a tyre. The tyre is just the rubber part.

Anyway that’s a standard quick release axle – the threaded part just sits in the fork dropout and only the axle is wider – the quick release is wider so clamps the outside of the fork to hold it.