21-speed left 3-speed single 21-speed right 7-speed single 21-speed Left 3-speed Right 7-pair 24-speed left 3-speed single 24-speed right 8-speed single 24-speed left 3-speed Right 8-speed single 24-speed Left 3-speed right 8-speed single 24-speed left 3-speed right 8-speed single 24-speed left 3-speed right
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