I purchased a Dunlop K739G (four stroke version supposedly harder and lasts about 50% longer than reg) and it lasted me 3 months before I was down to pretty much nothing, infact, when I had the tire mounted at the dealer, they tagged it, and that tag was still on the spoke when changed a month ago. Now, after 3 tires in the past year so far, I have changed to a tire I've installed at least once on every dirtbike to ever own, which is the Kenda Trakmaster 2. I used it on my YZ250 and lasted me 2 years. So, I installed the 120/90-19 version on my KX500. Anyway, it is a DOT tire that you would never believe was street legal and lasts forever cause it is very hard rubber. Anyway,