that is somewhat true and not to disrespect your knowledge, but say you buy a new set of tires, and the normal life expectancy out of a tire is 50,000 miles. when all of your tire's tread does not make contact with the road and only the inner part of the tire, it will reduce the tread life of the tire to almost 25,000 miles. which means that every 1 1/2 years you will have to replace tires. keep in mind that 50,000 is not the average life expectancy of a tire, it is usually much more but the # was used for argument purposes. also like mikey bottles said in previous post you must maintain and definitely get an alignment after it is lowered. if not you will see significantly less life out of a set of tires.