Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
Recommend to read
A FRENCH PLANE FOR THE ATOMIC BOMB
Strategic bomber Dassault MIRAGE IVA. To raise the country's prestige after the defeat in Vietnam and the independence of the defense capability of the United States, France officially...
Velocart
Several years ago, I made a small bicycle car for my sons (or, judging by its size or construction, it would be more accurate to call it a bicycle kart). The children liked the machine,...
