2-Pack) AR-PRO 8.5 Inches x 2 Inches Scooter Inner Tube Replacement - 50/75-6.1 Inner Tubes for Electric and Gas Scooters, Mini and Pocket Bikes, and More Butyl Rubber Inner Tubes - Walmart.com
Amazon.com: 8.5x2 Inch 50/75-6.1 Air Inner Tube Air Inflated Rubber Tube for Xiaomi M365 Electric Scooter Replacement Accessory, Inflatable Replacement Tube : Sports & Outdoors