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This is my wheel. On the TopBikeKit website it says their motor is 1.6kg which is impressive. Are they quiet ?

I hope I am not hijacking this thread just say :confused: I use to post several times every day on this forum for years when I was learning this stuff. If you are interested here are my Tongxin 36v, 180w, 260RPM, 28h motors. Not sure if you can still get them. They are only three wire not hall...

If you want to learn how to build wheels then 16/20" is the place to start. Plenty of youtube howtos and info on line. Small wheel builds are easy. I had to learn as 13 years ago it was impossible to get anyone to do electric hub builds for Brompton/small wheels. Radial makes it even easier...

Looking again at SJSCycles it appears some Brompton rims are only suited for rear/hub builds and as the spokes are crossed I guess that is why the angles are more and thus the holes drilled at an angle. They specifically say not for front wheels/two speed rear wheels or radial built wheels. As I...

Last post today ;) We use to use these which are single walled but obviously now you can get better double walled ones for the Brompton. Back then all Brompton rim holes were drilled straight whereas now, for the rear at least, I think they are drilled at an angle...

When we first built them we use to lace them up 1X but soon realised that radial lacing was sufficient (strength wise) for such small wheels. This also made the spoke angle and building more managable/simple :) As you can see on the wheel in the front of the picture (black Brompton) this was a...

All I recall (is was 13 years ago) the ones provided ready built from China use to have a generic 16" rim that had an ETRO of 305 whereas the Brompton rims are ETRO 349. The other challenge back then was the motors only came with 36h so could not be laced into a standard Brompton rim which was...

Yes on my 100mm hubs from memory, I think they are around 118mm. Radial builds are quite easy just lace up, bring up to tension and then work round keeping the rim straight and circular as you can. Loads of youtube videos show you how :)

The eletric hub will be much larger than the stock one, so very unlikely.

Probably Lithium Polymer which I used a lot in RC Flight (super light) but prefer safer Li-Ion cells on an ebike. Mine are built into both the older and newer Brompton rims which is not difficult for radial builds, as long as you get the spoke length correct :)

Meant to add in Cambridge (very flat) I get between 10-15 miles depending on wind. If I go further I just carry a spare. The motor is only 180w so not power hungry, draws less than 5-6amps max and mostly when I am pedaling less than a couple of amps. The solution would not meet requiments of...

All my electronics go in one back pocket of the Brompton bag and the battery in the other (it just fits). This keeps everything light, the main bag empty.and means you can carry Brompton in one hand and bag in another :) We had all the same issues you have found buying ready made up wheel sets...

There you go :) Good quality/safe Li-Ion Samsung Cells with a BMS built in. You'll need a charger and make some kind of connector (mine is also fused) as shown. Made by Spear & Jackson. These are from an older model lawnmower sold by Argos. I have four purchased off ebay as lots of the lawn...

Li-Ion. Hold on I will take a photo and post.

Years since I posted here but nice to see people still converting Bromptons. I was one of the first on here using a lightweight Tongxin (almost silent) motor sourced and shipped from China in 2010. I'm retired now but the steel one is still going strong. I now use prebuilt 4Ah 36v lawn mower...

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 :)

The bike stands fine though in its folded state it will sit wonky on the ground as the forks are wider. It does still fold ok but you may need to play around with the cable that exits the hub (cable tie the wire to the forks) as it can effect the clip mech. Yes widening the forks does seem a...

Spread mine over 9 years ago now still going strong after over 10k miles of use.. As per my thread likely you will have to spread them more than 83mm as they spring back. Make up a threaded rod like many have done before. You may also have to open the dropouts a little for the motor shaft. I...

I didn't get charged on the first Boss welder I purchased, but when it failed and I sent it back, I got charged on the replacement :( The replacement spent ages in customs and I guess they open some stuff up to check ? I usually find I get charged on anything over £50, again I guess it depends...

Rode my "steel" Brompton to and from work for almost 10 years, though not in snow and ice. Someone commented the other day how good it still looked (Front wheel Tonxin conversion) after nealry 10K miles. I wont be using it daily this winter, as I was fortunate to retire early last March :p...