The Kenda K‑50 18 × 2.125″ tire is a robust, all-purpose BMX-style tire designed for youth mountain bikes and kids' bikes. It features a classic short-knobby tread pattern that offers reliable traction on mixed terrain—from pavement to light dirt paths—making it a versatile choice for everyday riding. Built with a steel or wire bead clincher construction, the K‑50 is rated for inflation between 40 and 65 psi, ensuring a balance of comfort and responsiveness. Its ISO 18″ (355 mm diameter) sizing makes it a straightforward drop-in replacement for many small-frame bicycles. The tire typically comes in all-black color, but some whitewall variants are also available to suit rider style preferences.