A few days ago because of school need to buy a bike. Buy from the store directly ride away, and then found left and right hand, respectively, can turn things, friends that can be variable. The left is like the volume adjustment as the right ~ 1 ~ 7. I would like to ask what is the meaning, what is the use? I learned to ride only half a year. These do not understand. Please advise experts Ah! Answer better 50 points!
Variable, left hand is the front of the dental plate, the right hand is behind the flywheel
Left refers to a few people's power, the right is on behalf of several people, such as 3,7 is three manpower, on behalf of 7 people
Left and right, the more you tune the number of riding the more laborious, but riding fast, the smaller the number of calls, riding the more effort, but riding a slow.
