rear sprocket meaning in English
后链轮
Examples
- The bike course is generally flat . 21 - 24 tooth rear sprockets are recommended . athletes are advised to take extreme care on all turns and in areas where there are driveways
自行车赛程大部分都在平坦的公路上进行，运动员于转弯处及私人车道上应特别小心注意。