A good basic replacement tire for 27 Inch wheels. Its inverted tread pattern diverts water while good solid rubber prevents flats. A raised center tread allows speed on straights while extra tread on the sides provides added confidence in turns. Black Tread with Gumwall Side. 90 PSI Max. Wire bead. 424 grams. 27 x 1 18 Inch 28-630 ISO.Made in China.