If tyre only has a small hole, it can be repaired and only around $50. If you want to have a new tyre, it depends on the size of your tyre. As I know, around $400 for R14, around $600 for R15, around $900 for R16.
(1)If you are running on the road, then the tire is damaged,
You need to call a tow truck (<HKD300.00) to bring
your car to nearby tire company to replacement.
(2)if you car only broken one tire(which is current product),
it is easy replace another same brand and same size tire
(HKD500.- HKD600.-)
(3)unlucky, your broken tire is not current product, you
are needed to replace one pair tires (same size but other
brand) , over HKD1,000.- na!
If your tire is damaged while you are driving,
you do not know how to find tow truck immediately,
just call 999, the police will help you find the nearby
tow truck company, do not replace the spare tire by yourself
on road, stay in your car seat with safty belt!!!!!! :-(