Depends upon the way you drive on them. When properly inflated and rotated the last user is correct 75,000 to 100,000 miles on average, even on the cheapest set of tires.
Definition of morpheme. : a distinctive collocation of phonemes (as the free form pin or the bound form -s of pins) having no smaller meaningful parts.
Some of the phonemes that we use, foreign speakers have difficulty pronouncing, like the th sound. A morpheme is the smallest unit of meaningful sound. Morphemes can be words, such as a and but, or they can be parts of words, such as prefixes or suffixes. So language consists of phonemes put together to become morphemes, which make up words. These words are spoken or written in a particular order, called syntax.