Features: Make from Polyurethane, these solid tires is wear resistant and less prone to damage. Features special line for improved grip, offering better handling in diverse terrains. Equipped with advanced antiflat tire technology, ensuring a puncture resistant ride for mountain bikes. Suitable for 12x2.0, 12x2.125, 12 1/2x2 1/4, 12 1/2x1.5 (40-203). It is designs to bear long terms use without deformation, providing a reliable and stable performances for your bike. Specifications: Component: Polyurethane Inner diameter: about 19.50cm/7.68inch Outer diameter: about 28.50cm/11.22inch Inner width: about 2.3cm/0.91inch Outer width: about 4.50cm/1.77inch Package Includes: 1pc Solid Bicycles Tires note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.