What's so special about the shifting system for D2S?

Articles in this section

• What's included in the package for D2S?
• Can I ride D2s when it's raining?
• Does D2S easy for me to replace the accessories myself?
• Sometimes I need to take the D2S outdoors, is it heavy?
• Can D2S afford heavier riders?
• How long do I have to wait when D2S runs out of power?
• What's so special about the shifting system for D2S?
• How does D2S perform on rough roads?
• The D2S looks small and I wonder if he can handle the steep hills?
• Is D2S easy to fold?