I'm on my third replacement 200mm rear on my '06 Softail. Most I've gotten from my D407 Dunlop is 7k and change. To those who chime in about their narrower tire milage, it's irevelent, tires 180 and larger DO NOT GET the same mialge as narrower tires because they are softer compund for handling, wider patch tires need softer rubber for handling. There;s the odd claim of over 10k on 200mm or largr tires but I scratch my head on those, you either ride like an old lady or maybe your talking kilometers...
I have an 07 Heritage and got almost 11,000 miles on my rear tire before replacing. Just me and I do not ride hard. Always keep the tire pressure right.
How is your tire pressure? Just warn in the middle sounds like it might be a little high. I have almost 57000 kms on my 08 and am on my fourth rear tire, still the original front tire. Will have to change the front soon.
What the heck is a key-lom-iter? This is America man. Speak English !