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  1. M

    Battery size variance for given AH rating

    I recently purchased a battery from dhgate that was advertised as 48v and 15 amp hour bottle battery (full specs below). Upon delivery I was quite surprised to find that it was half the length of another bottle battery I have on hand, rated 48v and 14.5 amp hours. I know little about batteries...
  2. M

    stm8 code for flashing tsdz2 firmware

    eco-ebike.com now offers some customized firmware for the TSDZ2 that I'd like to try: https://www.eco-ebike.com/blogs/eco-cycles-instructionals/tsdz2programmingfromscratch They offer instructions on how to flash with the st-link software, but I don't have a windows machine. My plan was to try...
  3. M

    Play in TSDZ2 Spider

    I've noticed a few mm of play in the spider of my Tongsheng motor: https://youtu.be/I7ueCrxFKOU I've removed the five bolts, applied blue loctite, and reassembled with torque at 5nm, but the play persists. Is this normal? I noticed a large bearing inboard of the spider that protrudes from the...
  4. M

    Possible to power di2 with avg ebike battery?

    I'm thinking about getting a shimano di2 alfine hub for my commuter, which is set up with a TSDZ2 motor and 48v bottle battery. Has anyone tried to power di2 systems with an ebike battery and can point me to some resources on how to set it up?
  5. M

    Mid drive systems and bb thread integrity

    Would anyone have any insight as to how a properly installed mid drive, either Bafang or Tongsheng, impacts the threads in the bottom bracket shell over time? If you wanted to convert back to a non-ebike setup, would there be any thread damage? Are there products you could apply to the threads...
  6. M

    Any hope of TSDZ2 on pf92?

    I thought I might be clever and try out a Bafang press-fit adapter (https://www.empoweredcycles.com/collections/8fun-bafang-bbs02-accessories/products/shimano-pf41-bb92-89-5-92mm-to-bsa-adaptor-for-bbshd) to fit a TSDZ2 to a pf92 bike. After looking at the axle width of the Tongsheng (end of the...
  7. M

    Gruesome details of battery connection to TSDZ2

    I've got a 500watt 48v TSDZ2 motor on the way, along with a bottle style Panasonic 48v battery: http://auto-ebike.com/index.php?main_page=product_info&cPath=13&products_id=1736 I've been working on bikes a while now, and mounting the motor seems pretty straightforward, but my background in...
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