I drive the Schwalbe Big Aplle 60-559 for about 7000km and was always completely satisfied. About the air pressure (up to 4 bar) can control the damping characteristics you: strong spring with about 2 bar (good for dirt roads) to tough for fast driving (up to 4 bar). After the 7000 km, a new sentence was now due. The installation took place without problems. The profile is well suited for all substrates: rain-slicked pavement to dry dirt. Just perfect