First, I am super hard on any tire and not a good one to go by for wear predictions Second, I have yet to wear one out, I end up wearing fronts out faster. A KTM 1290 is a heavy bike with a lot of power, great brakes, and a skinny 21 inch front tire. Something has to give and for me at least front tires are the consumable weak link. That said the RallZ front Desert HT rear is the best combination I have ever run. I have put over 3000 mile on them before the front knobs get too tapered from braking and at that point I still had plenty of knob left on the rear. That is double the life I get from a TKC80.