A couple of us fitted them before the 2005 GS challenge, by the time we had arrived +- 1000kms the tyres were already showing signs of bad wear, only then did we notice they were the Korean manufactured ones, Leo had the German one's which he had ridden the first challenge with, they looked in a lot better condition than our's, by the time we got back to JHB the back tyres were virtually throw away, just got 3000kms, so it would certainly seem that the Korean tyres are not as good, my 2c worth.