sylph
1 µW
- Joined
- Apr 25, 2019
- Messages
- 1
Hi folks.
I've been lurking here for years, and riding one of those noisy converted road bikes with a gas engine.
I've been meaning to start working on an ebike for ages, and finally I'm getting around to it.
I'd ideally like to keep things extremely cheap and simple, even if that means losing some performance, and was hoping for a little advice. At the moment my ideal plan (probably pretty flawed) is to buy one of those 'my1020' motors from aliexpress, bolt a 36+ tooth sprocket on to the cranks, and have the motor thus pulling the cranks for me. I know that ideally I should fit a freewheel, but I think doing so will require welding beyond the scope of a simple, quick, dirty ebike conversion. I'm of the understanding that this might not have enough torque to do much, given that the ideal RPM of these motors is about 2800rpm. That would mean rotating the cranks at nearly 1000rpm for optimal power right? Is there a cheap(ish), commonly available reduction that can easily be fit on most mountain bike frames? Or is this not going to save any time and money in the long run, and I'd be better just getting something pre-made for mid drive (bafang? Or is there a product that's cheaper?)
Second, I wondered whether a controller is necessary?
Third, I wondered if, with appropriate reduction, it is even possible to have a mid-drive pulling the cranks without a freewheel and getting a decent output?
Thanks tons in advance. I know these probably sound really misguided, but I'm in quite a bit of confusion about how electric motors perform. I used to ride motorbikes, and am rather used to the power of petrol.
I've been lurking here for years, and riding one of those noisy converted road bikes with a gas engine.
I've been meaning to start working on an ebike for ages, and finally I'm getting around to it.
I'd ideally like to keep things extremely cheap and simple, even if that means losing some performance, and was hoping for a little advice. At the moment my ideal plan (probably pretty flawed) is to buy one of those 'my1020' motors from aliexpress, bolt a 36+ tooth sprocket on to the cranks, and have the motor thus pulling the cranks for me. I know that ideally I should fit a freewheel, but I think doing so will require welding beyond the scope of a simple, quick, dirty ebike conversion. I'm of the understanding that this might not have enough torque to do much, given that the ideal RPM of these motors is about 2800rpm. That would mean rotating the cranks at nearly 1000rpm for optimal power right? Is there a cheap(ish), commonly available reduction that can easily be fit on most mountain bike frames? Or is this not going to save any time and money in the long run, and I'd be better just getting something pre-made for mid drive (bafang? Or is there a product that's cheaper?)
Second, I wondered whether a controller is necessary?
Third, I wondered if, with appropriate reduction, it is even possible to have a mid-drive pulling the cranks without a freewheel and getting a decent output?
Thanks tons in advance. I know these probably sound really misguided, but I'm in quite a bit of confusion about how electric motors perform. I used to ride motorbikes, and am rather used to the power of petrol.