20' Outdoor Unicycle Wheel is constructed of a strong manganese steel frame and thick aluminum alloy rim for strong support and enhanced durability Features adjustable seat with a clamp on the seat post for height adjustment from 32' to 36' for user heights of 57' to 69' Features leakproof butyl inner tire which can be used up to 100 days after inflated Comes with a complete set of tools for quick installation Features mute bearing for noiseless riding, ideal for students, office workers, beginners