I love your hybrid. So simple and clean.
There isn’t enough information online to make a choice. Gonna be a 2-speed to start as the machining is the same for both on the gearset. Need to make sure it works and doesn’t grenade.
It seems that performance hybrids tend toward dual drive setups. I think if I make a hybrid I’ll model it on yours.
Whaaa... WHAT! E-stretch?
Yep as Rick said it’s not going to help much for replenishing energy. Maybe 5%. What it will do is provide you with a strong brake depending on your motor and controller setup; and you can save a lot of money and time on brake pads and maintenance.
Not all controllers do regen. Some are a single set regen power (2-wire, on/off). Others do variable regen. The connection is the same as the throttle 3 wire: ground, +5v, signal.
Your controller will have a wiring harness with gnd and +5v, and two or three analog inputs for throttle, regen brake, and pedal assist.
Sadly there are no brake levers for variable regen. There was one called the Sketchbrake for around $90 but they stopped producing it. I’ll be using a throttle turned around on the left bar. I heard it was a natural feeling setup. Previously I was using a thumb throttle and my thumb would fatigue frequently.
Also be aware that regen will charge your battery back at a far more significant rate than a charger. My regen approaches 35% of my max power and 80% of the battery’s rated maximum charge power. Your battery needs to be able to handle the higher charge rate.
Mechanical; the build must be direct drive or single speed no freewheels. Same way you’d set it up for engine braking.
Pete I can’t wait to see it.