Durable all weather urban tread . Features Schwalbe`s 5mm SmartGuard belt. EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kph. SGRD - Smartguard equipped tires feature a 5mm breaker belt made from special Indian and partially recycled rubber. REF - Reflective sidewall striping or hotpatch to aid in low light visibility. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires