That's good that you made a playful "deal" with her. The fact that she asked you to ride your bicycle can be a sign of interest. If this happened to me, I would do a couple of different things depending on where we are in the interaction. If she opened me with that, I would want a little more investment from her before I reward her with my bike so I may do a slight tease and start qualifying her. If she asked me this after I already got enough investment from her, I would something similar to what you've done.
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