A timeless classic tread with K-guard puncture resistance KGRD - Layer from natural rubber, reinforced with Kevlar fibres. The protection standard for every tire from the Active Line Style: Standard Size: 20x1.75 ISO: 406 Bead: Wire Belted: Belted Tread/SW: Bk/Blk PSI: 65 Weight: 580 TPI: 50 Features: KGRD