In the late eighteen hundreds the American military tried modifying bicycles to help infantryman cross rough terrain. Cycling continued experimenting and the first mountain bike was created in 1978 as the result. The popularity of mountain biking has grown ever since.
Mountain bikes are specially designed to perform on rough terrain. They have suspensions to help keeping the wheels in contact with the ground. Deep treaded tires for added traction and powerful disc brakes for safety. The core for mountain bikers is the small robust frame. It needs to be lightweight and highly durable. Today, I would like to introduce to you a video about how mountain bike frames are made.
Mountain bike frames are usually made from aluminum alloy which is lighter than steel and cheaper than carbon fiber. You can find my comparison between typical mountain bike fame materials at HERE
With modern technology, tubes are cut to the required size with consistent dimensions and precise cutting angles. This would be extremely important when we assembled the frame. Each model and size of frame has its own design which required different sophisticated steps of cutting.
Tubes are then attached together. It is a dedicated step because the tubes are very thin. After that, the aluminum frames then undergo a heat treatment. First, the frames are heated intensely then quickly put in a cold bath. This makes the metal easier to work with. The next step is necessary because slight deformations are created in the frame during welding. A technician is required to ensure the frames are perfectly parallel to the alignment table. This task usually takes a long time.
After alignment, the frames will be heated one last time to harden the aluminum. Once the aluminum frames exhibit the right mechanical properties, they are ready for painting step.
In the paint department, the frames are sprayed not only for good appearance but also to protect the frame. Next, the transfer tape is applied the logo on the bicycle frame. When buying new bicycles, most mountain bikers pay very close attention to the quality of the paint job. The frame is finished perfectly now. Then it is ready to more to assembling steps