What are the correct ways of using a double disc brake bike? - Quora
Dual Disc Brake - 180mm 29" MTB - Assembly of a calipers and wheel hub. - YouTube
Amazon.com : Elecony 24 Inch Fat Tire Bike Adult/Youth Full 7 Speeds Mountain Bike, Dual Disc Brake, High-Carbon Steel Frame, Front Suspension, Mountain Trail Bike, Urban Commuter City Bicycle (Green) : Sports
Disc Brakes Vs Drum Brakes: Which Is Better For Your Bike? - DriveSpark
Afoxsos 26 in. Mountain Bike, Shimano 21 Speeds with Mechanical Disc Brakes for Adults and Teenagers, Black HDMX1082 - The Home Depot