> Believe it or not, RPK is a function of the steel belt diameter > and not the amount of tread. I've done studies where tires were > tested for RPK with full tread-depth and then later shaved to > worn-out conditions. Interesting! Can you tell us more about your methodology? Your E-mail address caught my eye--isn't Kumho a Korean tire mfr? --Andrew Buc, Seattle, WA; 06-Jan-98, 21:40