If you don't like the idea of the space-saver, there is just enough room under the boot floor to fit a full size alloy. I carry the SE spec 185/50-16" wheel which required 15mm spacer strips on each side of the floor panel - For the strips I used high density soundproofing foam, cut from a sheet and held in place with double sided tape. Over the years I have had enough punctures to feel more comfortable carrying a standard size wheel, particularly when on holiday in the wilds of Scotland. It's also probably a good way of guatanteeing I will never have another puncture!!!