Please clarify gear reduction. Thanks.
I'm contemplating a DIY Ebike build using an EZip500 scooter for parts (24V 500Watt motor). I'm aiming for a low top speed, more torque setup for hill climbing. I'm figuring a 10-12 MPH max speed, does that sound about right for that purpose?
To reduce the RPM at the wheel, I'm going to use a jackshaft with a primary and secondary reduction. To calculate the RPM at the wheel do you multiply the primary reduction and secondary reduction then divide the motor RPM by the total reduction? I've seen examples online where people were adding the primary reduction and secondary reduction to get the total reduction then dividing motor RPM by total reduction. I'm a bit confused, can anyone clarify? Thanks, Mike