Type:Public Sharing Bike Wheel Size:26" Frame Material:Aluminum Alloy Fork Material:Aluminum Alloy Rim Material:Aluminum Alloy Net Weight:15.8KGS Gross Weight:22Kgs Size:26*17" Seat::Single Tardem Color:Customized Gear:Single gear Inner 3-speed Derailleur::SHIMANO 3 Speed SG-3R40 Brake:F: Disc Brake; R: SHIMANO Roller Brake Certification:IOS9001;CPSC; EN