A friend of mine put a pair on for a 1300km trip we did a couple of weeks back. That was 60 to 70 percent off road, on firm, stony tracks and the rest on road. My friend rides pretty hard, especially off road and the tyres are now very, very worn. The rear very quickly rounded off and started to wear. I'd say it's only got another 1000km left in it at most. The front will last a lot longer, but is also quite worn.

Generally, he liked the tyres and they performed pretty well on the road, but they do seem to wear fast. Another friend was on Pirelli MT21's and although they wore quite quickly too, it seems to be at a slower rate.

I've come to the conclusion though that XTs are hard on rear tyres. Even my Heidenau K60 Scout wore heavily on that trip, way more so than the same tyre on the same trip last year when I was riding a BMW GS.