[844PHW]

I'm all for choice but the options have to be available. To me, spacesavers and inflators are lazy design decisions. The real design challenge is to provide accommodation for a fullsize sparewheel while also fulfilling as far as possible a raft of other design requirements.
If all-out minimum weight is such a major emissions/environmental issue, cars should be banned from carrying passengers and should have fuel tanks that hold a maximum of 10 litres! I could go on.

The reasons why having a full size sparewheel is important include:
- Punctures occur. (ok, any workable solution would do for that one)
- There is a good chance a puncture will be too severe to be patchable by an inflator kit.
- There is a good chance that a puncture will occur when tyre centres are not open and/or in a place far from any such centre. This makes a spacesaver sparewheel doubly inconvenient. In any case there is a risk that the centre will not have the required type of tyre in stock (quite a high risk with the XC60).
- Full size sparewheels minimise the inconvenience of a puncture. You just swap with the spare and drive off as normal, not at a silly and possibly dangerously slow speed.

Reviewing the above and identifying what is not stated shows that there are actually quite a lot of issues needed to give the matter definitive coverage. However, that will have to do for now.

I do have a fullsize spare wheel for my XC60. So far I have already had one puncture, with a terminally damaged tyre, and it occurred at night. I am satisfied that having a fullsize spare wheel is the correct arrangement.