Product Description The old dream pairing reunited. Rapid Rob uses the former profile of Racing Ralph and for many years it has proved an attractive model. K-GUARD Protection layer reinforced with Kevlar® fibres. The protection standard for every tire from the Active Line. ACTIVE LINE The 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.