My riding style on my '15 is a bit "spirited". I'm on my 14th rear tire with 72k miles. Inflation pressures just 2-4 lbs over factory specifications. I bought the bike used with totally worn out factory tires on it. The previous owner went to the dealer for new tires and left with a new Trans Alp.
Some folks get more mileage by over inflating. JMHO, but I don't like giving up some safety to make a tire last a bit longer as I tend to use all of the tire.
I've had three Shinko rears, average life 3500 miles. Better for dirt than actual road tires, not overly inspiring for road use. After Shinkos I went to Pirelli Angel GT. There is no going back to the Shinkos after install a real sport touring tire. I've tried the Angels, Dunlop RS3, 023 and T-31 Evo Bridgestones. The RS3 and Angels lasted 5500 to 6000 miles, the T-31 about 4500. I buy the T-31 now as they run about $105 in rebate season.
The t-31, Angel, and RS3 all handle and ride quite well. A lot smoother ride than the Shinkos. The difference is quite noticeable.
Keep in mind my riding style is quite aggressive and I ride it mostly in the twistys, hence lower mileages than most. But the above info can give you an idea of wear ranges.
I've not tried any Michelins on the bike. I tried PR3s on a previous bike and was quite dissatisfied with the cupping on them as they aged. I've not tried the PR4 or 5. The road tires listed above all gave excellent handling right to the end.
