The Marathon Efficiency is an ultra-modern touring tire and sets the latest standard. It is Schwalbe's fastest touring tire with the lowest rolling resistance. The tire has very good puncture protection thanks to V-Guard and three-layer carcass construction on the sidewall Specifications: Color: black Material: rubber Weight: 970 grams Inch size: 27.5 x 2.15 ETRTO size: 55-584 Type of bicycle: touring bike, electric bike Type of tire: folding tire Reflection: yes Anti-leak: yes