-
Rau qhov kev txhawj xeeb tseem ceeb thaum xaiv roob tsheb kauj vab pedals.
Hauv kev caij tsheb kauj vab hauv roob, tiaj tus pedals tsis piv rau xauv pedals nyob rau hauv cov nqe lus ntawm pedaling efficiency, tab sis lawv kuj tau hlub los ntawm ntau tus neeg caij tsheb vim hais tias lawv muab ib tug ruaj khov pedaling platform thaum nws kuj rhiab heev thiab yooj yim rau siv.Lub tiaj tus pedals kuj tseem tsim nyog rau cov neeg uas tsis them nqi ...Nyeem ntxiv
