Brompton Conversion Kit(s) + Plus other small wheel motors/controllers etc

[crosschapel]

Hi Jerry, I am interested a couple of Brompton kits for the wife and I. What would you recommend? I am green as grass but reasonably competent mechanically. Could you advise where to source a battery pack?

 

[jerrysimon]

Well I would recommend the Tongxin narrow width (84mm) motor. You will need to spread the forks a little and fileout the dropouts. You can buy direct from China if you want.

A search of ebay for a 36V bottle battery would probably be best, Make sure it has decent Samsung cells in it though. I build much smaller packs for myself which weigh about 1/3 of these batteries as my trips are shorter (10-20 miles) and its no point in carrying round all that weight.

 

[crosschapel]

I was hoping you could supply me a couple of kits with everything I need including the wheels. Open to suggestions.

 

[jerrysimon]

I am waiting to hear from one person who initally expressed interest in the full Brompton kit shown.

Not sure if I have enough for two full Brompton kits after that.

 

[jerrysimon]

Ok sold the Tongxin/Brompton kit. Last chance before I stick the KeyDe motor on ebay.

 

[1Bondy12]

Hi,

Now I am getting back into doing conversions I have quite a few spares that need to be cleared from my stock. If I cant sell this stuff here I will put it on ebay without the offers to help with conversions and lace up wheels. Hopefully give something back to the forum if Brompoton owners are looking for a little help adding a kit to their bike. Of course you could wait for the new Brompton solution

1. First up I have all the parts new to convert your Brompton using the popular Tongxin narrow width motor. £200 + p&p. You will need to source a battery or see 4/5. below. Includes built up new Tongxin motor in new 16" Brompton rim, controller, throttle and hidden cutout brake sensor.

View attachment 20415

Closeup of the 36v, 260RPM, 83mm wide, 28h motor which will give you around 15mph assistance.

View attachment 20416

2. I do have a few unlaced narrow width Tongxin motors, (will convert most 16"-20" bikes with front hub conversion), and controllers. Looking for about £110 plus p&p for brand new motor. Could probably throw in a free "used" specific controller/throttle/cutout as well. You will need to build wheel/connect up controller, battery etc ( unless you want me to help see 4/5 below).


3. KeyDe kit. Full kit small 1.6Kg 36v, 28h, 260RPM front motor (new unused) with "used" controller for pedelec only function, new unused PAS and cutout brake. £150 + p&p. This will take a 16-20" wheel up to 17mph. You could also use a fully programable controller (I have one for £45) for throttle only if you want. I will lace it up for you as per 5 below.

View attachment 20417

View attachment 20418

4. I have some older small battery packs A123, 10s1p, 36v, 2.4Ah batteries and chargers which you can have free with any of the above. These are used but still have life in them and probably good if you need to test/do small journeys. I cannot post these, so collection only.

View attachment 20419

5. If you live near me (Cambridge) now that I am retired, I am happy to maybe help you with your conversion. All the motors are for 16-20" wheels and again happy to build them onto either for about £40 including rim and spokes. Postage would be more than a bare motor obviously.

Here are some of my conversions for which there are complete build threads on this forum. I have a spare Brompton umbilical/wiring loom again which I can use to help you if you want my offer of help convert your Brompton.

https://www.flickr.com/photos/45051578@N05/albums/72157630015987898

https://www.flickr.com/photos/45051578@N05/albums/72157628035746854

https://www.flickr.com/photos/45051578@N05/albums/72157624967712412

https://www.flickr.com/photos/45051578@N05/albums/72157632417224342

email or pm me if you are interested. I will not post outside the UK as had my fingers burnt with this before

Jerry

Hello mate I'm looking to electric up my Brompton do you still have kits for sale thanks Roy

 

[jerrysimon]

Sorry I only have spares left for myself and a few family/friends I have fitted them for.

Oh I do still have the KeyDe motor and controller though