Why is the speed the car has Electric Tricycle

Domestic market because consumers have not been able to appreciate the charm of the speed , so at this stage womens mountain bikes has not been widespread, but in Japan and Western countries shift is already very common ( 50% in the Japanese bikes are shifting car ) . Of course, the reason is that no maintenance . Recent new products as well as sensors and micro-motors Electric Bicycles through the computer to automatically shift the automatic transmission system .