As mr watson says it is a full size wheel, fitted with a sub standard tyre.
Today i have had another look at it, the spare is as follows.
Tyre details=215/65 R16 98M Bridgestone pressure 44psi
Road tyres are=215/60 R17 96H fitted with Dunlop ST20
Now the first xtrail i had also had a steel spare, but with a tyre to match the road wheels.
I do know the 17" wheels from the later xtrail versions will fit.
But am i right in saying, that this spare with the new xtrail, can be fitted with a 215/65 R16 98H SP20 as fitted to the 2004 xtrail i had?
Only i do have a part worn spare tyre, 5mm over 75%, 2mm on the sides.