Arizona(and may be other hot states like Nevada, New Mexico ...) have 6 years limit, the rest of country are 10 years.
Since you are going to Arizona at the end of the year, temperature with be lower than 70-80F you will be okay even with tread at less 4/32", assume that you will not be in a heavy rain on highway.
Since you are going to Arizona at the end of the year, temperature with be lower than 70-80F you will be okay even with tread at less 4/32", assume that you will not be in a heavy rain on highway.
