Well made of soft rubber with good stickiness. The tread pattern is not very deep but will help in dusty tracks and during cornering. Side profile is uniform and hard which will help keep the shape of the tire. The insert seems a little thin but works very well with the tire as its not made of the usual porous foam but denser material. This allows the tires to 'squish' a little and get grip. Overall, great value for general use or parking lots, dusty surfaces. And, oh, they look good on 24 mm rims !