Tires in traditional sizes and classic tread designs. Active Line quality. K-Guard puncture protection. Wired tires. Active Line ACTIVE LINEThe basis for all Active Line tires is the high-quality 50 EPI carcass. SCHWALBE no longer produces tires with a coarse 20 or 24 EPI carcass. In addition, K-Guard provides effective puncture protection for Active Line tires