Kenda Koncept 700 x 23c (K191) Wire Bead, Black & Orange Road Tire. Kenda Koncept 700 x 23c (K191) Wire Bead, Black & Orange Road Tire. Kenda Koncept is a strong, durable, lightweight tire with an excellent value for recreational riders. A file type (herringbone) tread pattern provides low rolling resistance and tight cornering in all road conditions. Smooth rounded tread with herringbone texture, high pressure rated (110 PSI). ISO Diameter: 622. ISO Width: 23mm. PSI: 90-110 PSI.