I have a Tongsheng fitted to my shopper and it’s great apart from the Q factor.
Even with better crank arms it’s still giving me grief.
If I can’t sort the pedals out I’m going to need a rear wheel drive kit.
It must be 250 w and so quiet you won’t notice it.
Guidance please.

Might ergotec pedals that reduce Q factor and slope outwards v. slightly to help your knees do the trick?
https://www.sjscycles.co.uk/pedals-cleats/humpert-ep1-pedals/
Alternatively ergon or specialized insoles are supposed to help with foot/knee position.

If you do give up on the tongshen I’ll have it off you 🙂

Hob motors are not as nice a riding experience.  torque sensing ( even if fitter) does not work as well

Even with better crank arms it’s still giving me grief

Which crank arms did you go for and what q-factor are they? It’s the only thing that annoys me about my Tongsheng kit.

These.
https://www.ebay.co.uk/itm/373154159723?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=ix9ukgeltw-&sssrc=2349624&ssuid=SyLfpeirQlG&var=&widget_ver=artemis&media=COPY
They bring each one in a cm. Just changing the drive side helps even them up….a bit!
The Shimano Steps are also good and can be 165 long which will also help.

Cheers, I looked at those recently. I’d quite like a RH one that brings it in 2cm – at least the cranks would be central then 🙂

I’ll try and have a proper measure tonight.

You are 14mm better off with the bafang cranks drive side.

Cheers for that, useful info! Sorry I can’t help with your rear wheel quest.