Schwalbe Road Cruiser 16x1.7547 305 16x1. 75 Kevlar Guard The well known Kevlar belt has been improved again. The protective layer is stronger and safer. But at the same time they managed to make the material much more elastic. The result is clear: a higher level of protection with a lower rolling resistance. Schwalbe Puncture Protection Level 3. Tire comes with dynamo ribbing on the sidewall. Specially designed for use with classic sidewall driven dynamos.