after a part worn pirelli p zero from a prodrive rim (205/45/17)tyre to match in with my other tyres, would be about 5-6mm of tread , just noticed one of my tyres has a slash in it and its got me nervous driving the car if ive got to put new on im gonna get a set of 4 toyo's but will be happy to put 1 good part worn on to match my set