Top-Choice For Rookies The old dream pairing reunited. Rapid Rob uses the former profile of Racing Ralph and for many years it has proved an attractive entry-level model. Tough Tom is a new addition, adopting the previous Nobby Nic profile. It’s the right choice for rougher trails or for the front wheel. Level 3 K-Guard Our minimum standard for protection belts. This Guard has been proven for many years. It consists of natural rubber and is reinforced with KEVLAR® fibres. Together with the 50 EPI carcass all Active Line tires are well protected against punctures. KEVLAR® is a trademark of DuPont. Active Line The basis for all Active Line tires is the high-quality 50 EPI casing material. SCHWALBE no longer produces tires with a coarse 20 or 24 EPI casing material. In addition, K-Guard provides effective puncture protection for Active Line tires.