... many types of gasoline or electric scooters. 3.00-8 motorcycle tubes: We are one of leading manufactures ... tube.Some sizes are used for various motorcycle and scooter, canload heavy weight.1.Size:2.25-17,2 ... -18, 3. 50-16, 3. 50-18, 4. 00-8, 4. 00-12, 80 / 90-18, 110-90-16 ... . 75-16, 2. 75-18, 275-21, 3. 00-8, 3. 00-10, 3. 00-12, 3. 00-14 ... -19, 3. 25-10, 3. 50-7, 3. 50-8, 3. 50-10, 3. 75-10, 3. 75-19 ...