My theory has always been if they are wearing then they are gripping (something). On my 800GS's the TKC80 was always the best all round tyre, particularly on dirt, but they wore out quicker than others I tried. The others I tried (about half a dozen different brands) all lasted longer but had nowhere near the performance so went back to the 80's. Currently have the Mitas E07's on the new 1250GSA and really like them on and off road AND they are lasting. In saying that they have done 6,500 now and the rear looks like it may have another thou or so left but I am noticing it is spinning up more on dirt and occasionally bitumen. That said I never got more than 5,000 out of the TKC80's on the 800's so I am still happy. I haven't been anywhere in the rain yet so cannot speak for them in the wet.