This is amazing mileage. I am on my 3rd rear PR3. Previous 2 have managed 16,000 km and been smooth on the right side and past the wear markers on the left at this mileage. First front was also smooth at 16,000km, the current one looks like I will get another 5,000 from it. The original Bridgestone 012 did 12,000 rear and 20,000 front. The BT 023's did fairly much the same. Was looking for a PR4GT's, but they are not available for another couple of weeks apparently (or is the supplier just trying to clear all the PR3's first?). Was considering the Pirelli Angel GT's, but have seen tests published which show considerable difference between the Michelin and Angel in wet weather braking.
I have always run 42 psi front and rear and check before every ride. What pressure are you guys running to get these unbelievable mileages?