ARISUN METRO RUNNER 27.5x1.75 BLACK WIRE/60 KDVersatile tread with directional deep siping, a prominent center section and textured shoulders for use on hardpack and pavement KD 1. 5mm thick composite mixture of rubber and Kevlar fiber belting increases protection from thorns and other piercing debris EBIKE25 has achieved a passing rating for use with E Bikes up to 25kph and is ECE R75 approved