Muscle to boost Bike

Hi friend ... how are you doing? It must be good right? Previously I apologize because I rarely post due to busy school matters and so on. However, now I took the time to re-share to all friends. Yaa ... although only slightly.

Cycling trip more efficient energy per kilometer than the trip in any way. Bicycles provide high efficiency because of the application of push and pull carefully. Frame made of pipes for pipe more resistant to pressure than the solid rod with the same weight. If the pedal was encouraged, rear wheel chain, which then planted on the ground. However, due to limited human drive, gears or gear used to reduce the speed of a bicycle and thus generate sufficient impetus for the passing grade.

Jendela Iptek - Teknologi
PT Balai Pustaka, Jakarta
Roger Bridgman 2000