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Can you explain why regen is a non-starter? I suspect its just been poorly implemented to-date with e-bikes. With the right controls and hardware it could work really well I think. Built into the motor so no extra parts required and with a proportional/variable brake lever control where the...

Thanks. Now I understand that some hub-drives are permanently engaged motors. This video is quite good too: Hopefully we'll see this stuff as standard and nicely developed in future. I think this morning I naively assumed I could add a small dedicated regen front hub and regen 50%!

Does your motor clutch in/out when you activate the regen then? I like the idea of a progressive lever (like a thumb throttle) to give variable braking. I suppose it could be done with a mid-drive motor if there was no hub-freewheel, although not sure the chain would take forces in the other...

This video was quite informative: Seems you'll only get about 10% of the energy back that you put in... So not worth carrying any extra hardware around for. If you can do it using your existing motor then maybe... I was naively thinking it could be much higher.

Hmmm I see a hub motor can be used to do regen, but most often they're not because they have a freewheel mechanism. I see some people are welding that solid, but then that will remove the ability to coast or vary the braking effort. I was hoping there was something more intelligent than that...

I did a lap of the Isle of Wight yesterday... 85 miles on my BBSHD from a 17.5Ah 52v battery.... so I was running at very low power levels typically about 100-150w and coasting down hills. Its a heavy old beast and I was putting some effort in on the hills. There's a lot of hills and they're...

Aha, that starts to make a bit more sense. So the 2600 calories that Strava quotes probably means equivalent to me eating 2600 calories and outputting 520. And of that the motor is giving 280 calories so just over half. This feels realistic to me. I've never tried a road bike...just mountain...

Battery started at 58v and was 54v at the end, so probably 325 watt hours. How did you convert from watt hours to calories? 200 sounds too low to me. If Strava said 2600 calories I’d expect at least half of that to come from the motor? I was using power level 3 of ten which is a max of 100W I...

My brain hurts… I cycled 50 miles in 6 hours. Strava says 2,600 calories. My 52v battery lost 5.75Ah. I was keeping the power down very low to maximise range and get a bit of exercise too. How can I calculate how many calories of the above the motor is responsible for?

https://bafangusadirect.com/pages/quiz this will get you a nice template showing different offset sprocket options.

There are some great sites offering to do laser cutting of small pieces for a reasonable price.

btw if anyone reads this thread and would find the broken tongsheng casing useful for a similar purpose get in touch and I'm sure we can sort something out.

yes that would be the sensible answer! Whenever I’ve mentioned my ebike conversion in the local bike shops they’ve looked at me like I’m insane and acted like they want nothing to do with it! yes it was brave to cut down the bottom bracket, but it solved the problem. Took about 3 hours to get...

It’ll probably be ok. You could locktite the thread, or put a paint mark across the thread and the nut so you can see if it moves. I had the same on mine but I sawed and filed the bottom bracket tube down a few MM to give myself some extra threads showing. That was a pig of a job to keep the...

You can run that hydraulic hose wherever you like, it doesn’t have to come out of the bottom tube where it does. They’re easy to makeup new ones to a different length. On my bike it runs along the underside of the top tube and then down the seat stay to the rear calliper. You could fit rivnuts...

It'd be nice to get the panels on the bike somehow; I guess there are capsule shaped solar vehicles land speed record money no object things, but if you could fill the wheels and the frame triangle on both sides with panels that would be a decent area. Or put it on a massive gantry to sits...

that sounds nice!

Im sure something could be made from a charger cradle, stick it in a small frame bag.

i have a bbshd with a 17.5ah battery so my tank weighs 25kgs! I fancy building another with one of the 1.75kg bafang hubs and using batteries from a standard power tool, Bosch/MAkita, 36v 5ah. but to be fair it wouldnt make enough difference to be worth the effort/expense. once on the move I...

I knocked up a spreadsheet in excel: 1. Based on knowing the number of teeth on the chain wheel and the RPM of the pedals you can calculate teeth per minute on the input to the chain 2. From that teeth per minute, with the number of teeth on the cassette you can calculate RPM of the rear wheel...