How do you make an almost perfect all-rounder even better? No easy challenge for the Schwalbe senior developer. The result however, is outstanding. The tread of the Smart Sam is modern and balanced at the same time. The compact central rib provides comfortable rolling; the edged outer lugs guarantee optimized off-road grip. For this reason Smart Sam is reliable in every condition and even rolls well on roads.DD RaceGuard Folding Version: With Double Defence suitable for E-Bikes up to to 50kph with Raceguard and SnakeSkin protection**Features:*** E-BIKE READY: E-50 For motor assist up to 50kph* PROTECTION (DD Version): RaceGuard - A double layer of nylon fabric offering great protection for light and sporty tyres* SIDEWALLS (DD Version): SnakeSkin which is a light and flexible carcass that makes the tyre highly resistant to scrubbing.* COMPOUND: ADDIX high performance* TPI: All Versions 67 TPI* WEIGHT: 27.5x2.25 - 830g / 27.5x2.6 - 930g / 29x2.25 885g