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A 21-speed bike offers more gear options than a 7-speed bike, allowing for better performance on varied terrains and inclines. The additional gears on a 21-speed bike provide a wider range of options for riders to adjust their pedaling resistance, making it more versatile and suitable for different riding conditions.

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1mo ago

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Q: What are the differences between a 7-speed and a 21-speed bike in terms of performance and functionality?
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