This is the second rear BT45 that I have had the same problem with on my K75. On the first tire I noticed the problem at 4000 miles this one 5000. From other posts it seems 6000 is the norm for wear but this shouldn't be a normal wear pattern. I really like the way the bike handles with the Battlax 45's but I think it's time to try a different brand. Other members have posted that they have had similar issues with other brands but has anyone experienced this twice?