cheapcookie wrote: ↑
May 30 2019 1:07pm
In a hypothetical world, 1 or 2 stage direct driven 6 bolt disc brake mid drive mountain bike, vesc controller.
- I doubt the usefulness of a rear disc brake (lightweight human) because of powerful front brakes and regen braking
- I double the usefulness of speeds, derailleur and cassette. Because of powerful top end and low end, added complexity
A 2 stage drive isn't a direct drive. With any kind of freewheel or one way bearing, you have no regen. You need a rear brake.
Also, regen braking is just a drag brake. it will slow you down, but not stop you. While some high end controllers have variable regen, it has no where near the modulation of a rear brake. If you're not also using a rear brake, you're not riding your bike anywhere close to it's potential.
For example, it would be impossible to perform proper trail braking with a Regen brake. Without a rear brake, you will be much slower through a corner.
A 1 speed bike is fine, for a hub motor. I've built several and geared them to be easy to pedal unpowered if I want to.
But this is the non-hub motor forum, and a non hub motor not
running through a variable gear set is kind of missing all the fun and the point of a non hub motor. Variable gear trains let you run smaller, lighter motors with a wider torque range and higher efficiency under load.