- #36

Wilson123

- 58

- 2

It seems your gear ratio question may irrelevant. The optimum ratio has more to do with the end user's preferences and not a formula. If you have the time consider temporarily adapting your lever design to a multi-speed bicycle, grab a chair, head someplace where there are a lot of people and test. Find out what the preferred ratios are and then decide based on your knowledge of Indonesia. Then again, sometimes you just have to make a decision based on your experience. Pursuing a formula to justify or rationalize a gear ratio choice in your situation is to me what would require justification. Please explain what you expect to achieve by calculating gear ratios when it's a fairly straight ratio? With a chain it's just a matter of counting the gear teeth isn't it? It's why I asked about sprocket or pulley. Pulleys would be just slightly more involved for ratios.

I am just trying to work out what the size of each gear should be for a use over mainly rough terrain. Is this possible? Or will the gears just be the same size with the power provided to the wheels being varied by where the user pushes the lever?