well that's the thing, you started competitive cycling 3 years ago, that means you started with you were 13? I'd say starting cycling that early (and without doing any other stick & ball sports) hinder your natural jumping ability. Reason why I say that is because cycling only uses very specific muscles, and furthermore these muscles are use in a "non full range" motion, and using muscles in a less than full range motion is what you want to AVOID doing repetively if "overall athleticism" is your goal.
But how did you get into cycling so early? Almost all highschools (in the US) do not have a cycling program. Did your dad get you into it?