a blow out in the front can kill you,a blow out in the rear not so much,alway put your best tires in front
it's better to spend an hour moving tires around then barrel rolling down the highway
and never put a donut on the front
Wow! If you had noticed the ware earlier you could have increased your toe in and saved a little tire life depending on what tools you had on hand. Last month I had to replace my two front tires as they both had cracks showing tread separation and one was forming a bubble in the sidewall.