Answer:
(Fatwa: 167K/14K=1431)
It may be allowable in childhood as play and game, but after 9 of age when she is mature and starts attracting the gaze of non-mahram men, cycling is not lawful for her.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
