The term 'Bike Feature' can be broken down into two crossword solutions: AXLE (4 letters) and Longi (5 letters). An AXLE is a shaft that connects two wheels of a vehicle, such as a bicycle. It is usually made of metal and is used to transfer power from the pedals to the wheels. Longi is short for 'LONGITUDINAL, ' which refers to the direction of the AXLE in relation to the frame of the bike. LONGITUDINAL axles are positioned parallel to the frame, allowing the bike to move forward and backward.