The problem with under-inflating a tire is that it overheats and shortens its life drastically. It may be OK if you're drag racing but, for running around town and going up the motorway it's not a good idea.
This is a more complicated affect than it might first appear. Decreasing the air pressure in the tires of a car that is stuck in mud, or soft sand can increase the traction because more tire comes into contact with the mud or sand. This is qualified however, since driving with under inflated air pressure causes the tire to "roll" making the car unstable. Tread design, as well as material also interact with the optimal tire pressure. This, in turn, depends upon the type of vehicle and type of driving. For example, a car, an 18 wheeler truck, a race car, and a dragster have very different tire designs and optimal air pressures.
Assuming you mean wear of the edges of the tires, and not the middle, this is an issue of UNDER inflation of the tires.
The foil in front of the rear tires is there to proven air from getting under the rear tires and causing the tires to loose traction.
Using a mini pump with a gauge for inflating tires offers the benefit of accurately measuring and controlling the air pressure in the tires. This helps to prevent over-inflation or under-inflation, which can improve fuel efficiency, tire longevity, and overall vehicle performance.
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.
For added tractionAt low speeds the tires tend to cool down and lose traction. Swerving serves to increase tire temperature and, hence, traction. Also, hot tires become quite sticky. rubber scrubbed from tires during a race collects on the track, so when the cars slow down, the pieces of rubber collect on the tires which means they need to be cleaned. The swerving helps remove the excess to improve traction on the restart.
Many tires have a steel wire core in the rubber to make them stronger. Metal tires transmit every bump and change in the ground under them. In order to have good traction, they have to have bumps and tread built into them. These tend to destroy roads. Rubber provides good traction and a smoother ride for the passengers while not destroying the roads that they run on.
Over or under inflation of the tires can cause shoulder wear. A misaligned front end can also cause this.
The amount of air you put in bike tires is typically measured in pounds per square inch (psi). The recommended psi for bike tires can vary depending on the type of tire and the rider's weight. It is important to check the sidewall of the tire for the recommended psi range and use a tire pressure gauge to ensure proper inflation. Over or under-inflated tires can affect the performance and safety of your bike.
The Michelin HydroEdge Passenger All-Season 205/55R16 is one of the best in wet conditions
The braking of the car and, give the driver heavy steering
Over inflating tires can slightly increase gas mileage by creating less roll resistence (less tire touching the road). However, there are several downsides. Decreased traction means worse braking and handling, especially on wet pavement. Also, increased air pressure will cause premature and uneven tire wear in the middle of the tire.
Nitto Terra Grapplers are all-terrain tires that are designed to provide exceptional traction for use on any type of terrain under any weather condition.