WHAT DOES ENGINE BIKE EXHAUST MEAN?

110CC BICYCLE ENGINE Package: The 2 Stroke bicycle engine package is powerful and sturdy, accelerating your bike to the maximum speed of 55km/h and enabling you to totally benefit from the enjoyment of Using in your commute and brief journeys.Hanger: part of frame or an attachment on the frame to which the derailleur is connected (see Derailleur h