I have repeated and ongoing problems with brand new michelin tires losing traction, especially on wet roads. this happens every time i have to pull out onto a highway. it also happens less frequently on dry roads. i have spoken with the new car dealership where i bought the vehicle and with michelin tire customer service people. the tires are the michelin primacy mxm4 p235/60r/18 all-seasontires. michelin told me that "slippage", (which i call traction,) is not covered by their warranty. it is extremely disturbing to me to see a tire company, especially michelin, to say that the tractions capabilities of one of their new tires is not something they will stand behind. *tr