Classic center rib profile is versatile and offers pleasant rolling characteristics. Green Compound is manufactured from natural rubber obtained from renewable rubber trees and from recycled rubber materials. Equipped with a 50 TPI carcass and reflective trim. Also equipped with a 3mm Puncture Guard. PGRD - Puncture Guard Affordable 3mm rubber breaker belt . Twin Skin - An additional rubber coating on the side protects against cuts and allows for uniform coloring. EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kph. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires