I cannot understand why some of you guys in the states are getting poor mileage from 023.s.I have run them for 9 years now on the same st 1300 here in Australia. rear tyre at 42 psi =21,000 klms Front tyre at 42psi =24.000 klms. These kilometres hardly ever change. cant wait for the T30. my average speed is a consistant 110 - 115 klms per hr .they are in my opinion brilliant Tyres.I have never changed brands, why would I!.