electric bicycle

[BrianG]

What about one of those inline planetary gearboxes? They usually are good for around 6:1. Maybe two of those "in series" to get a good ~36:1 ratio would make gearing much easier.

[mikey09120]

im planning on using this servo tester (suggested by brushlessboy16)
and myabe 2 orders of these for 6s 8000mah 10c for 80A cont and 120A burst for only $80
and this pinion. it has a large surface area and is cheap

now all i need is the tranny plate

[JERRY2KONE]

You already have a pile of gear there that needs to be put to good use. Don't scrap that project so easily yet. Just take a step back and rethink your approach. With what you have there you can still make this a very cool project. You may need to go a slightly different direction with your gearing or even your drive setup to accomplish your goal, but it is still possible to get her done.

Maybe a belt drive with a spring loaded clutch assembly, or like suggested my BrianG using an inline planetary gear setup to get your gear reduction would be a better choice. There has to be something that you can do to make it work fairly well. Don't give up on it yet.