I ride PR2's exclusively. Put over 175k on them between 2 bikes. (FJRs) I finally had an opportunity this winter/spring to ride a
PR2 front to the chords. Thought I would never get there! AFTER the tire is smooth you still have a ways to go. I finally packed a
tire for change out and rode 160 miles north to a friends for a swap. Like an idiot, I did not get a pic. Maybe Jim (fljab) still has the tire and
can take a pic of it? The tire had over 27k on it.
As far as the rear wear goes; I try to ride "B" spec tires which I believe give me longer wear life. Usually 15-18k is normal, but I have yet
to take a rear to the chords. Here are some pics from another posting that will give you some reference:
This tire had 14k on it:
When I cut into it for a project, I found it had many more miles left to give:
As you can see the chords still had a great deal of rubber on the outside. The inside rubber once you are through to the chords
wears pretty quickly. Was on a ride (RAT) when a rider rode 700 miles after the chords appeared. Not recommended, however it
is nice to know.