... speed, scooter, off road ( cross ), motorcycle street, tubeless tire, inner tube ( natural tube & butyl tube ) sizes as below: MOTORCYCLE GENERAL ... 2. 75-17, 2. 75-18, 3. 00-18, 3. 25-16, 3. 25-18, 3. 50-16, 3. 50-18, 4. 00-8, 4. 00-12, 80 / 90-18, 110-90 ... 275-21, 3. 00-8, 3. 00-10, 3. 00-12, 3. 00-14, 3. 00-16, 3. 00-17, 3. 00-18, 3. 00-19, 3. 25-10, 3. 50-7, 3. 50-8, 3. 50-10, 3. 75-10, 3. 75-19 ...