I just have to mention, with my other vehicle with split two piece alloy wheels, with the green goo in the tube for 'puncture proof tyres'
the tube perrished most way around the seam where the rim joins together.
Now I have tubes without goo, at the front particularly.
As a bye when I bought my robin estate, [posh us] a spare was not sold with the car as it put the beast over weight, you bought it seperatly.
(it was fitted with plastic windows, but damage one and they didn't sell you plastic only glass, I suppose if you get it overweight it is OK but dealer won't)