Specialized four-season compound and versitile fast rolling tread with pronounced corner knobs provides full grip in all conditions short of smooth ice . One of the first tires to be designed specifically for year round use. DG - Dual Guard Dual layer protection with a layer of nylon fabric and a 2.5mm rubber breaker belt. EBIKE50 - has achieved a passing rating for use with E-Bikes up to 50kph and is ECE-R75 approved. REF - Reflective sidewall striping or hotpatch to aid in low light visibility. Twin Skin - An additional rubber coating on the side protects against cuts and allows for uniform coloring. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires