THE DEFINITIVE GUIDE TO ENGINE BIKE 50CC

Freehub (Rear Wheel Only) – the ingredient in a modern bicycle’s rear wheel hub that allows the wheel to spin freely when coasting, but engages the drivetrain when pedaling. The cassette slots on to the freehub physique.Seat lug: a frame lug on the top of the bike’s seat tube serving as a point of attachment for a clamp to protected the seat