On 22/04/2016 14:02, NY wrote:

Temporary spare tyres ought to be banned and manufacturers ought to be
compelled by law to find a way of fitting a full-size spare with no
speed or distance limits.

You can do that yourself. You may however object to the cost and the
space it takes in the boot - but if you want that reliability, you need
to take that trade-off.

Wheels are enormous these days - the reduction in luggage capacity from
carrying a full size spare is significant, especially in a small car.

Or you could make sure that when you buy a car, it either has what you
need or you include in the budget and capacity calculations the DIY option.