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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?
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psb
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That's a good point! Coaster brake won't function at all as the cranks are independent from the chainring to allow the throttle to be used without pedalling
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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!
M_A_X
cmyj
Thank you, looking forward to seeing them. I have two young kids, for various reasons there's no way I would ever have that much time to myself to work on it. I sold loads of records to vinyl pimp so have the cash to get a shop to do it.
I have an older Bullitt with a coaster brake. Do you think that will cause any difficulties?