> because they get tire punctures with no or crappy rental car jacks, etc. (Or they change tires and the doughnut spare lasts for 5 minutes.)
The sharp rocks of Death Valley and other super arid parts of Nevada was not something I had really thought about until I saw a picture of the car from one of my friends in Nevada. In addition to the normal full-size spare tire, there were two other tires stuck in the back of the car. He worked in a mine and apparently the road up there was full of these sharp rocks so there were days (not often) that he had to change 2 tires during his commute.
I imagine that it is particular type of rock prone to fracturing with sharp edges. But I also wonder if the sharper rocks more common because of the super arid conditions and are not worn down by the weather.
I drove on a farm track in the Coromandel, New Zealand. The track was very steep and there was lots of wheel spinning getting through. The sharp rocks messed up the tyres. On closer inspection the rocks were bits of volcanic obsidian.
The sharp rocks of Death Valley and other super arid parts of Nevada was not something I had really thought about until I saw a picture of the car from one of my friends in Nevada. In addition to the normal full-size spare tire, there were two other tires stuck in the back of the car. He worked in a mine and apparently the road up there was full of these sharp rocks so there were days (not often) that he had to change 2 tires during his commute.
I imagine that it is particular type of rock prone to fracturing with sharp edges. But I also wonder if the sharper rocks more common because of the super arid conditions and are not worn down by the weather.