I bought a bike used, still with OEM fitted Continental travel contact tires.. tread designed for trekking , touring on paved and dirt roads..
tread design smooth band down center for pavement, a row of knobs on the edges ,
got so many critics, repeatedly telling me my knobby tires need replacing.. worn down smooth in the center..
I changed to Schwalbe Marathons. Continental model still made, a good tire for the ride anywhere cycletourist..
..