Hi guys I got 8,500kms out of the horrible D222 rear tyre replaced it with my favourite PR4s as mentioned in other posts the front tyre still looks like new and I have just clocked 10,500km since purchasing bike at the end of March.
The PR4 has totally changed the feel of the bike inspiring heaps more confidience compaired with standard factory offerings,here in New Zealand we do have a varity of road surfaces.