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If you get a hub drive kit from Grin, they sell torque sensors that replace the bottom bracket with a torque sensing bottom bracket and you can use the square taper cranks of your choice. Rear hub drive kits are a little more work to install, but not too bad if you are already comfortable...

I just wipe my chain off with a rag or paper towel and apply 3-n-1 oil every 100 miles or so. Once in a very long while I will remove the chain and clean everything with paint thinner if I think it is getting cruddy looking. I just dunk the chain in a small bucket (coffee can) with paint thinner...

Yes. I have never had to fuss with brakes as much as I did with the Tektro Lyra mechanical disc brakes.

I have had both mechanical and hydraulic disc brakes. Hydraulic disc brakes are self adjusting and that makes all the difference. I had to fuss with the alignment of the mechanical disc brakes every time I took a wheel off the bike and even though I adjusted them frequently, they were noisy. The...

I prefer swept back bars also. That isn't the right part. That converts it to a threadless stem. This is an extender, but I would just buy a new longer stem...

You could replace the front fork with a disc ready fork. You should be using your front brakes for most of your braking anyway. They do sell adapters to mount a disk brake to the rear dropouts, but I wouldn't trust one or use one. Unless you are planning to ride really fast or stop on long steep...

If you drive around to the north shore, there is a paved bike path at the boat launch area at Stanfield Cutoff that is good for a few miles. You can also take a dirt forest service road, 2N13 (AKA Snowslide), from Fawnskin to Green Valley Lake. Snowslide used to be the main road to Big Bear...

I am pretty sure you need a romeo connector to mate with a juliet. 😄

That connector is a JST connector. You can get a kit with a crimping tool on Amazon with a selection of connectors. I would just replace the JST with a waterproof HIGO or Julet connector. If you buy an extension cable, you can cut it in half and have both the female and male ends to solder to...

Higher voltage will use less current for the same power. Watts = Amps X Voltage. So you won't melt anything in the motor with the higher voltage.

Here is another source for controllers. It looks like you can pay with Paypal. https://ebikeling.com/collections/ebike-controllers

It is hard to parse your questions, but it seems that you have two motors that could work. You need a controller for the MAC 12T or you have a Bafang motor that you also need a controller for. Grin sells controllers that are compatible with both motors and you would be able to get support from...

If you can rent an ebike near you for the day, it would give you a chance to see if one would work for you.

Statistics shouldn't be confused with facts. "There are three kinds of lies: lies, damned lies, and statistics." - Mark Twain

I don't think that is a fuse. It is a jumper to select the voltage. Look at the picture in Gionnirocket's first post. It seems to be the exact same board.

Since the output signal is RS232, any USB to serial converter will work, including the Prolific chip that Tom suggested. The three wires are RS232 TX, RX, and ground. I am not sure about the CH340, but Prolific support is built into Windows and you shouldn't need to install drivers for it.

The HW-597 appears to use the CH340 chip. https://electrobes.com/product/ch-340-usb-to-ttl-serial-hw-597-converter-module/

There is a song about that, "Take the Long Way Home"...

It would be better to have the wire exit the motor pointing down to avoid having water run down the wire into the motor if it is not sealed well. Exiting downward and then routing it back up will create drip loop in the wire.

I think that it is not accurate to say that speed limits are completely ignored by everyone. While I do exceed the speed limit in my car, I try not to go more than 5mph or so over the speed limit. Excessive speeding and weaving through traffic will draw the attention of law enforcement. I also...