I have to say, the Chinese rubber on my old bike was actually shockingly good! Did one hell of a lot of miles in all kinds of weather with nowhere near enough attention being paid to tyre pressure and they held up really well. Right at the end of their life by the time the bike was written off, but they'd done 5 figures by then I'm sure that only being mounted on a 125 was a factor in that, but still... Only lost traction three times that I can recall and once was on a carpet of hailstones, once on a diesel spill, and the other time was my own stupid fault