This is a pair of JConcepts Pin Downs Carpet and Astro Rear Buggy Tires and Foam Inserts. Directional pin spiked tread with heavy radiuses at bottom that allow pin to wear more consistently For use on carpet and astroturf Pink (medium soft) compound Textured tire carcass indicates direction Two Pin Downs Carpet and Astro Rear Buggy Tires in Pink Compound Two Gray Open Cell Inserts Tire Glue 2.2: Rear Buggy Wheels Inner Diameter: 2.2" (56mm) Width: 1.6 (50.5mm) jxs 07/21/16 ir/jxs &