Elliana Zimmerman is a first grader at Highlands who races BMX bikes. (Photos: Louis B. Ruediger | TribLive)
Not long after she began to walk, Elliana Zimmerman learned to pedal.
The Tarentum youngster, now 6, went from a Fred Flinstone-style balance bike to pedaling — quickly — around a bumpy BMX track, according to her mother, Alexis…