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I’m looking at exactly this now to run on my Omnium Mini Max. Was it primarily torque sensing that made you choose Tongsheng over Bafang? I read some reliability issues but still looks the best.
I’m also curious if the right crank arm sticks out more than the left, or if the it’s pretty centred (unlike Bafang I think) - keen not to mess up my right knee. Cheers!
cmyj-
Yeah primarily torque sensing. Considered the reliability issues, but it sounds like as long as you treat it carefully it should be OK. I'm not ragging it around, so will hopefully last a while...
From eye-ing it, it looks like right does stick out a little more than left (I will try and measure sometime this evening). The cranks supplied increase the Q-factor quite a bit, so could get some different square-tapered cranks that decrease the Q (or make it more even).
psb
I put a tong on my bike a couple of weeks ago (a pashley I bought off @passhunting last year). Pretty simple really, just swap the bottom bracket and wire everything up. Probably took no more than 2 hours. I got my from PSW Power on ali. Came to £400.13 for both the motor and a 48V 12.5amh (if you use the 'ship from China' option, although it actually comes from Germany...). I think coaster brake may be an issue with the tong as you can't acutally back-pedal due to a cluch thing which stops the front cog rotating backward (although the cranks still rotate), I assume to protect the mechanism or something?