Search results for query: hub motor vs crank

Nothing unusual happened, I noticed it wasn't cutting in and out on a ride as usual, most of the time it was fine again if I sped up a teeny bit and I was thinking I might have had some dirt on the magnets or something and I'll sort it out when I got home, but then after a quick stop to have a...

Hello, there is a knocking noise coming from the bottom bracket of my Woosh Krieger. The Krieger has a Bewo mid-drive motor, also known as a TCM motor. I can't find any information on it online. It has gradually been getting worse. It only happens in the mid gears, 3, 4 and 5. The...

It depends on your motor's winding speed. Stick a magnet on it and use a cycle computer to show it's maximum rpm when you power it up unloaded, or I think there are some phone apps that can get the rpm optically, if you put a blob of Tipex on it. Ideally the motor should run at around 75% of max...

Hi, I've made a freewheel chainset. The question is what sprockets would work best? I have a 24T and a 34T which I have bolted onto the toothless freewheel. I made an adapter to screw it onto the crank which is a steel one from from a really cheapo chainset I had. I was wondering what the...

It makes no difference what type of motor or where the motor is. It's all down to how good the algorithms in the controller are. Your original ones are crappy, so you need a controller with better ones. The type of sensor doesn't make a massive difference, it's what the controller does with it...

Concerning Harrys last comment. I went back and checked and i was mistaken. I have three large pins. I claim old age and poor eye sight! It seems to me that torque sensing, if it functions lineally, would work best with a motor at the crank. I have a rear motor and so every time i change...

You can try it, but I'm pretty sure that locking compound won't hold it. The whole torque of the motor on that small diameter will be trying to unscrew it.

Hi , I see now that the crank has to freewheel, whereas you don't need a freewheel on the motor. I can just loctite the sprocket on the motor to its thread. If I use 638 it'll never come loose or i could use nut locking grade which would enable me to remove it. I have a fixie that will fit...

According to that photo, the motor is driving in the direction you want but won't drive a chain with a normal freewheel because it's freewheeling in the wrong direction, but you can fit a simple screw-on sprocket with an appropriate spacer; however, it would tend to unscrew whenever the motor...

I still can't understand what you're trying to do. A sketch or photo would help. When I made my DIY crank-drive bike, I needed drive from the other side of the motor, so I screwed a freewheel thread to the disc fixings, then I was able to screw on a normal freewheel. I made the adapter by...

The speed with the wheel off the ground depends on the motor constant (Kv). When the motor spins it becomes a generator. The voltage it generates is opposite to the battery voltage and is equal to RPM x Kv. When the motor reaches a certain RPM the net voltage is no longer enough to push the...

I don't have strong feelings about anything. I only use pragmatism. I use both types of motor regularly, so I'm in a strong position to give you the facts. It's up to you whether you use the facts. It's good that you're thinking about what information you receive. For what you want, there's not...

The type of motor - crank vs hub - has no bearing on that. How natural it feels depends on the control system for the motor. You get crap and good control systems for both, and some that feel natural and some that don't. The best control system is the one that gives the power you want with the...

I'm not aware of many torque sense DIY hub motor kits, unless you want to buy some add-ons from Grin in Vancouver, CA. They seem kind of bulky to me. I'm in the USA, living in Illinois, but I've carted my ebikes out to South Dakota and Colorado, and down to flat Florida. My wife and I are...

I respect that you are a long term member of the forum and have infinitely more experience than I do with ebikes. On the other hand it feels like you are missing the point of my bike riding. I really have no desire to ride around 20 mph regularly. I would actually be fine with cruising at my...

I wouldn't get any of them for a ride like that. Crank-motors are only necesserry for off-road stuff, towing or very steep long climbs and things like that. A geared hub-motor is just so much better for normal riding on the road, especially at around 20 mph. You need 48v and a 22A controller...

If your bike is legally configured I don't think you have anything to worry about. From what you say above, it was YOUR arm effort that was making the bike wheel go fast, not the motor. If your bike is legal, just relax, ride it sensibly and enjoy it. Nobody is after people like you. I...

Yeah, I really needed a second person to do the filming. I was turning the crank by hand. So, on max assist just turning the pedals at a medium pace activates the PAS to the legal limit but if I turn the crank fast, it is obviously making the rear wheel go very fast. The thing is are the police...

Is it exceeding 16 miles an hour because of your hand cranking effort? You say it exceeds if you pedal it fast. To see what the motor is providing, just crank it enough to make the motor work. It is quite easy to hand crank a bike on a stand to 30 miles an hour in top gear with no load on the...

All hypothetical, and not relevant to me, both my bbs01b motors are both ultra reliable and customisable, and once I purchase a uart controller as a spare then that'll serve me well if they fail. And if the spare eventually fails, and I get fed up with DIY or tinkering I'll probably just go to...