The Tri-501 Blue Triton Pro is can be adjusted from 4' to 6' 4", and has a 20" front wheel. The Triton Pro has all of the qualities you're looking for in a leisure use bicycle: comfort, a smooth ride, and easy maintenance! The unique steering mechanism of the Triton Pro makes navigation easy and fun. The patented design and adjustable frame makes riding the Triton Pro comfortable for riders of various heights and sizes.