Kenda Universal MC/MX Standard Inner Tube (05233620). Rim Diameter: 23". Tire Size: 300/325. Valve Type: TR-4. Kenda offers a wide range of inner tubes for your motorcycle tires. This premium product is expertly manufactured to strict industry standards to offer a fusion of well-balanced design and a high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and lasting value. This product is distinguished by a total quality guarantee, unsurpassed by anyone else.