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Will the low voltage cut off of the controller designed for lead acid batteries be ok for lithium? I imagine that will be set for about 34 to 35 V so it shouldn't do any harm, but range may be lower than might be expected.

I wouldn't want to go drilling holes in the frame. Best solution I've found is to 3D print your own mounts:

Had a look on Endless Sphere and there was this link about an external controller on this Italian forum: http://www.jobike.it/forum/topic.asp?TOPIC_ID=75861 So it seems possible. I wonder how well it ran.

I was wondering, has anyone ever tried controlling a TSDZ2 not with the stock controller, but a generic off the shelf 15A controller? Can it be done?

Last week I sent an email to Bonnie to ask about Xiongda CST motors. Sadly, the company has decided to no longer sell to individual buyers :( Minimum order size is now 100 units. Any other options?

I am inclined to agree with you, but having hub gears means you then have to go mid drive or front drive.

Just so long as you've got the labels all pointing the same way you'll be fine... ;) With chains I think you have to be a bit pragmatic about it. It's the hardest working bit of your bike and once exposed to the elements, they don't last. Chains are so cheap now, if you ride a lot it's best...

Spokes from Ryan do all sorts of spokes, including variable thickness: https://www.spokesfromryan.com/product/sapim-d-light-silver/

With one of my Sans chargers, one of the toroids was not soldered properly onto the PCB. It didn't cause a mains trip, but the charger would not work. Once soldered securely in place it all worked ok. Have a look out for poor soldering with a good magnifying glass. A lot of the stuff that comes...

Yes it can be done. You need a USB-C handshake board to tell the port to supply 20V, not 5V, then you need a voltage converter to step up the 20V to 42V.

Just a thought to throw into the mix - how about a recumbent bike? Spread the load over your body rather than on its most sensitive bits. Best wishes for the op, hope all goes well!

I quite often find that the magnet disc can get knocked on things and get twisted as it is quite exposed, so turn the crank a full revolution and see that it is the same distance away throughout and try and get the gap to the sensor to be as small as possible without touching. On my controller...

That is exactly my point. You have to "consent" to handing over huge amounts of personal data to a foreign company (on hardware more often than not made in China) or else you can't lead a normal life these days.

I say "stealing" as there is no way of giving meaningful consent. It is not "free" as you have to give up so much in order to be able to use it.

No, Google isn't free, it's "stealing" your data and monetising it. Have you tried cycle streets? https://www.cyclestreets.net/

However, even if the BMS is balancing at 41V, it's still a win, as without this experiment, I wouldn't know that it was. I have another identical BMS and at some point I'll rig it up with some cells that are out of balance, charge at 41V and see what happens.

Unfortunately the BMS is a sealed unit, so I can't get to the bleed resistors.

Today the pack finally passed the 100 Cycle mark! Charged to 41.001V: Bank no. ) Voltage 1) 4.0986 2) 4.0972 3)...

Hmm not sure on that one...the "technical limit" of my clothing only goes as far as cotton t-shirts and jeans :D

What a lot of people don't realise is that modern washing at low temperatures does not remove body odours from clothes. This is particularly important for those of us who ride and arrive at work in a bit of a sweat. So every so often, clothes should be washed at higher temperatures. Every 10...