Cargo Bikes

Ok. I'll get some tomorrow.

Its totally doable yourself if you can put the time aside.
I couldn't and can't.

welcome to come and have a look at mine if you are in London

Thanks, yes I am in Bermondsey, do you have a Tong or a Baf?

Ok. I'll get some tomorrow.

Its totally doable yourself if you can put the time aside.
I couldn't and can't.

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?

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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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

Mounting the battery is the biggest faff on a bullit, this mount looks tidy and simple..

I fitted a bafang on my friends bakfiets and the total time it took was about 4 hours

Also have the kids, so I get you here.

Older bullitt can take a tong sheng, because the area under the BB shell is different to the newer model. Whether you want a tong or not is up to you. I thought "oh I WANT a tong because, it's like having bionic legz rather than being pushed up the hill". I had a go on the bafang after fitting and I don't care anymore....

when you don't pedal, my motor doesn't kick in. When I pedal it kicks in a beat later. Is fine.

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!

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

Hey Max, would the same apply to a Bafang?

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).

You can get a coaster brake version of the tongsheng apparently: https://www.amazon.co.uk/Tongsheng-Coaster-Version-Brushless-Conversion/dp/B074S1LS3W

Yes

Highly recommend plugging a computer in and playing with the settings, will stop the lag and make it feel a lot smoother

Bafang, in SE6

Hmm. I almost never use the coaster brake, always the hand brake for the front hydro disc. 99% of the time that I do end up using the coaster, it's in error. I wouldn't really care that much to see it go, but I guess I'd be in trouble if the front failed. (probably need some new pads at this stage)

Bleurgh. Do Besbike do Bullitt rear wheels and dropouts? SBC do but it was pretty expensive.

Drop in and see them? They're just round the corner from deptford.

Can you replace coaster brake?

Oh I thought they were out near Richmond somewhere. Have you gone to see them in Deptford?

Yeah!
Its on lovibond lane (on the way to Greenwich).
I had loads of emails back and forth, which were great, but I reckon I could have had answers quicker by speaking.

First test today with eldest as a passenger to swimming in deptford this evening. I have spare time between 610 and 650 if you want to meet and have a chat when I'm there and have a go.

I'll PM you

thanks, good to know. Still my idea of quite expensive but it does sound like a good solution.

Is anyone a CAD wizard and would like to help me out?

Phillip on the cargobikeforum made this excellent box design and gave the plans to anyone who wants to get it made themselves.

I'd like to modify it slightly so that it could be more like this Holde box from splendid cycles: https://www.splendidcycles.com/products/bullitt-accessories

I need to modify Phillip's CAD file to include some slots for the ratchet strap to hold it together like the Holde box. So that you can quickly remove the sides and use the flat area of the cargo bike for big loads.

Can anyone do that for me?
The CAD files are here: https://drive.google.com/drive/folders/1FPC1mH-Rbvi3E82x7RyDxFp4XDILlzBm?usp=sharing

I was thinking about getting it made out of HDPE sheet by a manufacturer in the UK, called Sentinel plastics, (who are great, we've used them to make bike polo mallet heads )

Would anyone else be interested in going in on this? It would be cheaper if we did a bulk order.

on the cargobikeforum

Where's this please? I can see a German one. Thanks.

Yeah that's the one

https://drive.google.com/.../1FPC1mH...

Link broken?

Where were you a couple of weeks ago!?
I ended up going all out and using madjax for a wooden box seat and cushion. My kids could have had less comfort and I'd have had more money!