One of the problems of a pedal of a drive of the bike was and still remains the need to change torque to the driving wheel depending on road conditions. And I must say that the designers decide, but in many ways They even created planetary drive bushings, however they are complicated and therefore not cheap. So often on the rear wheel set of the multistage transmission with more asterisks and mechanisms for the transfer and payment chain length. This is the most waste and inexpensive option. But the number of stars (usually three. sometimes four) is sometimes not enough. Then to increase the number of “speeds” leading asterisk also make two – and even three-stage.
What if the solution to this problem is to limit, again only one star, but now leading — it is large, it is possible to experiment in a wider range, and it is “at hand”, or rather under the feet. And in order not to group a block of a few stars — make one, with a variable diameter. But how is that possible? I think so! Here is a crucial idea to use when transmitting the torque from drive sprocket to driven simple device (a kind of CVT) installed in place of the large sprocket on a normal road bike, I want to share with readers.