I'm about to hit 25k on my tires (my first set I had on for 26k before I bought wheels from TR and had these mounted on them at the same time). They will DEFINITELY not hit 50k. Ever. At 25k, I'm 2/32nds in the front and 6/32nds in the rear. That's not good.
That being said...it's definitely a good tire although it does get real noisy once the tread is visibly worn. Unless I can find a tire better (maybe the Michelin Primacy MXM4), I'll probably get these again. Even though the tread doesn't last long, they are still great tires.