I replaced both tires this past weekend, with another set of BT-020F tires (thanks TBT). Looks like I got about 14,300 mi out of the rear, and 14,700 mi out of the front. The rear was worn down to where the tread was almost worn smooth in the middle, the front had very minor cupping and the tread was almost to the wear bar.
Note that the ST is my daily commuter, so 99.99999% of my riding is commuting to/from work (97mi round trip), about half is on freeway with speeds anywhere from insane to a crawl, the other half is parkway with speeds around 60-65. Every once in a while I'm able to get away from the insane asylum and turn it up a notch or two, but not frequent enough - obviously from my tire mileage. :
Note that the ST is my daily commuter, so 99.99999% of my riding is commuting to/from work (97mi round trip), about half is on freeway with speeds anywhere from insane to a crawl, the other half is parkway with speeds around 60-65. Every once in a while I'm able to get away from the insane asylum and turn it up a notch or two, but not frequent enough - obviously from my tire mileage. :