It's a long drawn out story i'm afraid, in a nut shell, i can't in full confidence, say fit a "proper" tyre and then you can, legally or saftley tow with the steel rim that comes with the temporary spare.
The reason for this is nissan's case manager, (who i decided was a bit of a plonker) Sent me a letter stating that to tow i must replace the steel wheel with a 17" alloy.
When i asked him how that decision was made, he was honest enough to admit that his decision was directly as a result of him phoning a nissan dealer! So rather than be guided by the "expertise" of a nissan dealer, i discussed my problem with my local tyre fitter, with who i have had a long association.
He checked the steel rim, and concluled that it would be ok to mount a proper tyre on it.
Now i owed the first xtrail, this had 16" alloy wheels, came with a 16" steel rim, but with a tyre the same as the alloys.
The hand book made no mention of not using the tyre to tow, with the first xtrail.
The new xtrail came with 17" alloys, with 215/60 r17 98H tyres
The temporary tyre was a 16" steel wheel, fitted with 215/65 r16 98M.
Now when i used a comparison site, it was concluded that the spare came out 4mm smaller in overall diameter, than the alloys fitted with 60 profile.
My reasoning is this, if it was safe to tow with a steel wheel, and "proper" tyre, then logically it must be safe to tow the new xtrail also.
So i had a 215/65 r16 98H load rated tyre fitted, of the same make as the alloy tyres.
As i said this is my decision, so you have to make your own mind up. Either way if i get a flat tyre i now have a much safer spare, in particulary while solo, should i get a punture, my intention is to use the spare at a reduced speed say below 50mph, and get it replaced asap.