all tires last the same amount on the rear no matter what.
I have went through a bunch of brands, and all i get out of a rear tire is 7k miles...
right now i have a metzler 880 on... it replaced a cheng or one of those asian named
tires.
the asian tire lasted 7000 miles it had replaced a dunlop, that lasted 7000 miles.
The asian tire was half the price of the others...
I noticed the cheap asian tire, made me feel as if my butt was stuck to the road... the mechanic said that was because it was made of cheap soft sticky rubber and that was why it was no good.... it actually had another 1000 miles left on it but it had gotten a nail... where the dunlop was slick at 7000 miles...Now the sidewalls were soft on the asian tire. The metzler i have on now, has such hard sidewalls that i think if i had a flat i would not know it....
So I believe your choice is not based on miles per tire... but on three things.... cost...
stuck to the road.... or hard sidewalls for flat safety...
those are your real choices... and honestly your probably better off with a cheap tire that is stuck to the road....