Hey Bart-
I had about 25,000 kilometres (15K miles)on the original KDWs, and they were still around 5/32", about half-done. I don't push them too hard; only once in awhile.
I don't have any suspension mods either; all original.
I replaced them because, immediately after an alignment at the dealer, the left front went almost bald in one weekend trip of about 1,000 km (600 or so miles). Since BFG could not find a 215 anywhere in North America, I had to replace all four with the 225s.
(The alignment at the dealer is another story)
Observation #1: I find the original KDWs, and these new ones, stick like glue.
Observation #2: I had three people (I weigh about 190, the other two about 200 each), plus three sets of golf clubs in the car this afternoon, and still no rubbing whatsoever.
Observation #3: I don't find the noise from these tires objectionable at all.
Comment #1: While shopping for replacements, I looked at the KDWS, and the Pirelli P7000 SuperSport. The tire shop here suggested I not bother with any "all-season" ultra high performance tire if I really planned to use them in the Canadian winter. He said anything with that kind of speed rating is pretty much useless below 3 celsius.
Hope that helps.
