My rear with unknown KM's on it when i got the bike flattened off on the Balranald ride.
Still has plenty of meat on it....
I replaced the front when i got back - it was shagged but i knew before departing it was close to it's used by date.
Having had PR3's on old silver & the K11 before it, i know the lifespan is pretty good(25k +)
I do like the pirelli's but i will wait & see how the front wears in the months leading up to NR16 departure.
For the price i don't mind sacrificing them on the perth trip