Universal Quick Release MTB Bike Rear Rack with Red Rear Reflector

Top-mounted bicycle frame: also known as roof-mounted bicycle frame, it has the advantage of being able to carry bicycles while driving fast, professional, safe and stable, and is popular with bicycle clubs and professional athletes. The disadvantage is that after the bicycle is fixed on the roof of the car, the height increases significantly, and the trafficability will be affected to a certain extent; The most stable and safe overhead bicycle frame in the world adopts the design of double arms.

The frame is generally made of ordinary carbon copper pipes through welding and combination. In order to reduce the weight of the pipe and improve the strength, high-grade bicycles are made of low-alloy steel pipes. In order to reduce the resistance of fast driving, some bicycles also use streamlined steel pipes.