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  • In everyday riding, often found that some riders do not properly use transmission, uphill, using the maximum front, behind or in front of the smallest maximum, behind a small common occurrences, this is the most taboo gear ratio match. Uphill, the rider, shortness of breath, upper body sway, labored vigorously stampede before the line, I heard a vo...
  • In everyday riding, often found that some riders do not properly use transmission, uphill, using the maximum front, behind or in front of the smallest maximum, behind a small common occurrences, this is the most taboo gear ratio match. Uphill, the rider, shortness of breath, upper body sway, labored vigorously stampede before the line, I heard a vo...
  • In everyday riding, often found that some riders do not properly use transmission, uphill, using the maximum front, behind or in front of the smallest maximum, behind a small common occurrences, this is the most taboo gear ratio match. Uphill, the rider, shortness of breath, upper body sway, labored vigorously stampede before the line, I heard a vo...
  • In everyday riding, often found that some riders do not properly use transmission, uphill, using the maximum front, behind or in front of the smallest maximum, behind a small common occurrences, this is the most taboo gear ratio match. Uphill, the rider, shortness of breath, upper body sway, labored vigorously stampede before the line, I heard a vo...