Home / TFCFL 21-Speed Bike Folding Mountain Bike with Variable Speed Positioning Chain Large Footrest Folding Clip

TFCFL 21-Speed Bike Folding Mountain Bike with Variable Speed Positioning Chain Large Footrest Folding Clip

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  • 21-Speed Bike:Its main wheel has 3 discs and the driven wheel has 7 discs, you can choose to hang on different discs of the main and driven wheels to get 21 different speeds to facilitate your
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