Smart Sam: How do you make an almost perfect all-rounder even better? It's no easy task for the Schwalbe chief developers. However, the result is outstanding. The profile of the Smart Sam is modern and robust at the same time. The compact center ridge ensures a pleasant rolling experience, while the angular outer lugs guarantee optimized off-road grip. Thus, Smart Sam feels at home in any terrain and rolls easily on the road as well. Smart Sam DD: With Double Defense technology (RaceGuard and SnakeSkin from bead to bead), it is perfectly prepared for use on e-MTBs.