flats, shortened life due to uneven or accelerated wear, and and propulsion inefficiency.
Yes, under-inflated tires are dangerous. They can also leave the rim under heavy cornering.
Yes they do.
Under-inflated tires and duals that touch
Steel belted tires have that look.
you drive too fast through standing water on under- inflated tires.
The braking of the car and, give the driver heavy steering
Accelerating and braking abruptly, an out-of-tune engine, under-inflated tires, to name a few.
Underinflated tires wear faster on the sides than the middle.
tread on the sides of the tire will be more worn down then the middle
Have your tires rotated and balanced every 5000 miles. Check air pressures regularly so exterior or interior wear does not occur depending on if the tires are over inflated or under inflated. Manufacture recommended tire pressures can be found within the door jam or in the owners manual.
Some motorists don't know that their tyres are flat or under inflated others just buy new tyres but others don't have a problem with this because they check their tyres regularly.
Under inflated tires will affect any car's performance and thus be a safety hazard as well as a cost to the owner in the way of lower fuel mileage and additional wear on the tires. The fuel mileage on under inflated tires I would say is about 1-5mpg reduction. However, that's not the biggest concern. On an AWD vehicle you want all tires to have the same amount of wear as well as proper inflation to prevent any damage to the differential and computer. Driving short distances with under inflated tires wont hurt the vehicle but it would not be something I would recommend long term.