Amazon.com: (2-Pack) 12" (12 1/2 x 2 1/4) Thicker Inner Tubes for Electric Scooters and Mini Bikes, Compatible with 12.5x2.25-12x2.125 Inflatable Tires (Includes 2 Tire Levers for Easy Replacement). : Sports & Outdoors
Amazon.com: RidTianTek 10x2.5 Solid Tires 10 Inch for Kugoo M4/M4 Pro for Zero 10X Electric Scooter Accessories, Off-Road Replacement Rubber Tires for 10x2.125 and 10x2.25 Tires, Anti-shock and Anti-slip (1 Pc) :
ulip 10x2.125 Solid Scooter Tire Front and Rear Wheels Replacement for – Ulip store