SWB MARATHON PLUS MTB 29x2.1 PERF TWIN SM-GUARD BK/BK/REF DUAL E50 WIREOne of the most puncture resistant tires Schwalbe makes for MTB features connected offset center ribs that provide low rolling resistance and strong outer lugs that dig into the corners SmartGuard puncture protection is composed of an ultra durable indian rubber 5mm thick belt for resisting all but the largest road and trail debris Equally suitable for paved path and off road use EBIKE50 has achieved a passing rating for use with E Bikes up to 50kph