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Many thanks for the detailed and informative reply.

Not sure about the lateral play, as I never checked before dismantling the bike, but what you say makes sense as the pedals don't always feel solid. I didn't even realise that the Tongsheng had an actual clutch, I was just describing symptoms of how it felt. Given my general ignorance, I think...

I agree that the TSDZ2B is super efficient. My average battery usage is between 5-7 Watt-hours per km (8-11Wh per mile), and that's with me only putting in moderate effort. I have a nice compact 36V 16Ah battery, so I could easily be looking at a 100km ride on a single charge. Like many other...

I have a Tongsheng TSDZ2 which I have put about 4,000km on. I've had a few niggles with it, (which I mentioned in a thread titled Tongsheng Grinding) but it moved to a new level recently. This added to some existing clicks and grinds, which tended to get worse during a ride. After a freewheel...

Interesting. I thought I had fixed that, but I just checked again, and yes, the locking ring has worked loose again.

Do you mean the external locking ring? Because that was something I checked thoroughly after seeing a YouTube video.

I have a Tongsheng TSDZ2 mid-drive motor, which suits me well and on which I have ridden about 2000km. Recently, though, a horrible grinding noise has emerged when I am riding. I have done some analysis of this and discovered: the problem only occurs when pedaling - there is no noise when...

I should have mentioned earlier that I switched from the LCD5 display which came with the motor to a 500c display, which is far superior. You can choose between 3, 5 and 9 different assist levels, max speed cutout and other interesting items. It's very much changed the feel of the bike for me.

One trick I discovered after a cut-out caused by excessive voltage sag is to disconnect the battery and then re-connect it. If you don't do this, some motors will continue to act as if the voltage is too low. Disconnecting and reconnecting gives the motor a chance to reboot itself, it seems...

Keep pedaling, mate. After all, what is life without a bit of adventure and freedom to get around (plus a few bumps and scrapes)? I don't know if you are as hard as Nails, or Nails is harder than you, but I salute your spirit.

S5 # of Magnetics 1-99 / 1 - How many magnets have you installed on the wheel where the speed sensor is operating? Normally only 1.

This is a great all-round measure of efficiency. With my hub motor in Trail mode, averaging about 18mph, I use up 14.4 Wh/mile. In ECO mode at 14mph, I only use 9.4Wh/mile. Very similar to your figures. I did a tour with the TSDZ2 yesterday, mixing modes strategically, averaged about 15mph and...

That's another factor which favors the hub drive. With the front-hub motor, I stay in top gear unless there's a serious hill coming up. With the mid-drive, I'm constantly working the gears along with the assist level to try to get the optimal amount of power.

This is a bit of a long story about motor types, and effectiveness. I evaluate my e-bikes for effectiveness by their combination of speed, range, and rider power input which are optimal. For 2 years I rode a 500W 36V front-hub motor from a Chinese company called Jueshuai, which features 3 modes...

I guess it is common knowledge that a battery's voltage can actually increase just by leaving it lying around not charging, as the reduction in current load can allow the battery to recover. But I'm wondering about the extent of that. I have a 36V 2P10S Li-ion battery, which gave out while I...

Right. So the motor firmware is using the speed data in some way to adjust the power output? I guess there's a reason for that, but I can't think what it is ...

What is the trick behind disconnecting the speed sensor? All my settings in the service menu seem to match your suggestions. The main problem seems to be that after 8500km on a cadence sensor bike, I need some re-education on how to ride a realistic bicycle again. (I nearly got to Petaluma...

Thanks again for the detailed help. I am glad to say that I follow many of the best practices you recommend - I never installed the throttle, for example, and I always back off the pedals when shifting. I do tend to stay in a higher gear than may be optimal, though, probably a result of my...

Front hub motors have plenty of upsides - two-wheel drive (if you're pedalling) giving good climbing, good weight balance, no stress on the chain and cassette, motor keeps cool. They also have downsides - poor traction off-road or in the wet, and uncomfortable over even small bumps due to that...

Thanks for the helpful reply. I would certainly like to tinker with the firmware - I find 300% way too much, and 36% rather too low. I think that 50-100-150-200 would suit me better. But I'm a bit dubious about reading through 2000 lines of C code (posted elsewhere on the forum) and flashing the...