Inducing the MXR 140 Semi Auto 14x17! If you are looking for a mid size play bike that riders of every skill level with love, the MXR 140 is the perfect fit! Featuring a smooth and easy to operate semi auto 4 speed transmission, long travel suspension, 14x17 track and trail friendly wheels. No other bike on the market will build confidence and skill like the MXR 140. Additional features include, performance exhaust system, airbox, ultraflex plastics. Optional plug and play head light and tail light are available.