16' Unicycle features manganese steel frame and aluminum alloy rim for durability Adjustable seat with a clamp on the seat post for quick height adjustment, ranging from 28' to 32' Leakproof butyl inner tire provides durability; rubber outer tire and pedal with skid proof pattern ensure safety Suitable for students, beginners, riding amateurs to use for daily fitness exercise and riding practice A complete set of tools includes quick release seat post clamp, wrench and screws for easy installation