I came across an article online about changing flat tires and I'd like to share it here. Is it okay to change a flat tire when we got one? Or, should we change other tires at the same time in addition to a flat tire? The experts say that we can only change a flat tire if other tires are still new. That's because there is almost the same performance between a new tire and other unchanged ones. However, they recommend that we change some tires if the other ones are not new. In this case, we might want to change all tires at the same time. If your car is 2 wheel drive, you could only change not less than two tires. Anyway, it is necessary to exchange new tires with the ones that drive(propel) the car. This might make us worry about the cost for change of tires, but we need to maintain good condition of our cars to decrease (lessen, reduce) the accident rate. The "Ministry of Land, Infrastructure, Transport and Tourism" says that the most troubles are due to broken parts in a car on a highway and a local road, they are tire related such as flat ones and inappropriate air pressure. That's why we should pay more attention to tires. We must know that the tires are very important parts to save our lives. "PS. I agree, power without control is nothing"