Cycling (and age) will kill your vertical jump.
I'm 5'7" and could dunk a small basketball or soccer ball on a 10' rim with room to spare, but I had a hard time dunking an NBA sized ball because my hands are small, but if I bounce the ball and time my jump perfectly then I could dunk it pretty good.
I could easily grab rim with both hands with a 3-step start.
Standing vertical jump as a high school freshman was 35", by senior it was 42-43".
I'm also good long jumper and triple jumper.
l also ran the 100m and 200m though I'm only average, usually a mid- to back- of the pack.
also ran 400m and did ok in it, low 50s lap.
In high school the football coach invited me to traning camp to run 40-yd and I beat all of their WRs and RBs
Like most sports that require fast twitch muscles, it's mainly genetic. It's easier to train for endurance than it is train for speed. With sprinting and jumping, it's either you have it or you don't.
Today, 20 years later, I cannot dunk anymore, but I still can almost touch rim one-handed with a running start. Nowaday, my training is mainly about endurance cycling, usually can just make the top 10% in all the big local climbs. But I'll bet i can out jump all the guys who beat me on the climbs!