The next rear I put on the Hayabusa will probably be, but I'm still running on the rubber that was one it when I bought it from the dealership -- they put on fresh right before I bought it. Being street rubber, I don't really do a huge burnout or anything, I goose it for 1-2 seconds to spin it and put just a little heat in it, barely get some mist of smoke from it, so the current set has lasted pretty long. It's sad I don't even recall what they are, but I'm thinking Bridgestones.