Japanese Specialized Cars: The A-bike sold in other countries is about 10.8 ft (3.3 m) per pedal rotation, but Japanese special cars are approximately 12.5 ft (3.8 m) per pedal rotation. A general city cycle known as a mommy-chari, is about 14.5 - 15.7 feet (4.0 - 4.3 m) per pedal rotation. ■ The newly developed high-performance gel is infused with high pressure into the tube, creating a no-punk tire that dramatically improves cushioning. This newly developed gel and infused technology have solved the flaws of the previous gel infused method. You will forget that your ride is no punk tires. This is a new gel developed in Japan. The gel is also infused in Japan. ■ For parts (parts), please contact us if you purchase A-bike from our store. ■Note: Do not drive in rainy or wet roads. Please store inside to prevent it from getting wet. Unavoidable, if you ride in rainy weather or ride on a wet road, be sure to completely dry and lubricate it. ■We will deal with initial defects but we cannot accept returns for the convenience of the customer. ■Please register at your nearest bicycle store.