Sturdy and Durable: Replacement Tires are made of rubber material, sturdy and durable. Great replacement accessory for the old or broken tire. Inflatable Tire: High puncture resistance, durability to tearing and chunking,convenient to use. Tire Inner Tube Comes with Air Valve, it is easy to inflat.Lightweight and small size. Size: (Approx) out dia. 22.5cm/8.8inch, inner dia. 16cm/6.3inch, width 7cm/2.7inch Suitable Model: Suitable for M-i for MaxG30 for NinebotMax. (Applicable models: Scooter; Types: 60/70-6.5) Colour: black Material: rubber Package Contents: 1 x inner tube 1 x Outer tube Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.