Brompton Electric. Game changer?

Electrically assisted bikes, trikes, etc.
User avatar
georgew
Posts: 1480
Joined: 27 Jan 2007, 4:23pm

Re: Brompton Electric. Game changer?

Postby georgew » 4 Aug 2017, 1:02pm

This is hardly new as the ARCCinnovations Brompton pedal assist has been around a good time now.

https://arccinnovations.com/brompton.php

Randy_Butternubs
Posts: 60
Joined: 16 Jun 2017, 8:32pm

Re: Brompton Electric. Game changer?

Postby Randy_Butternubs » 4 Aug 2017, 5:07pm

PH wrote:
Gattonero wrote:
PH wrote:I've looked at secondhand Bromptons and this is certainly true. Not so sure it'll transfer to the electric version - I don't have a crystal ball but I would be surprised if any electric bike produced today would look attractive against one produced in 5+ years time.


There comes the humble Brompton whom designs hasn't changed in decades 8)

I'll wager the battery and motor doesn't stay the same for anything as long as the bike has. Why would it if the technology improves? Or do you think it's already reached it's zenith?


Electric motors are a mature technology and are already extremely efficient. Given the low power output of a legal e-bike I think current motors will remain 'just fine' for a long time if the law doesn't change.

The battery is a different issue as new ones will become incrementally better through technological advances whilst existing batteries degrade as all batteries do. Hopefully Brompton will keep the connector block standard so that owners can buy the new, better batteries in the future.

User avatar
Gattonero
Posts: 3577
Joined: 31 Jan 2016, 1:35pm
Location: London
Contact:

Re: Brompton Electric. Game changer?

Postby Gattonero » 4 Aug 2017, 8:24pm

Randy_Butternubs wrote:...Hopefully Brompton will keep the connector block standard so that owners can buy the new, better batteries in the future.


They are known for keeping their bikes serviceable during time. That's why I bought one 8)
It is by riding a bicycle that you learn the contours of a country best,
since you have to sweat up the hills and coast down them.
Thus you remember them as they actually are...

User avatar
simonineaston
Posts: 2305
Joined: 9 May 2007, 1:06pm
Location: Bristol - work in... Yate!

Re: Brompton Electric. Game changer?

Postby simonineaston » 28 Aug 2017, 12:26pm

[XAP]Bob wrote:There was a 'nano' motor which was available for the front wheel of a Brommie for a long while - are they no longer available?

Tony Castle, the bloke who does the conversion work at nano, has my Brompton at the mo' for purposes of said conversion :-) He's a fine fellow, who is always thinking about new ideas and is totally into bikes of all stripes. I took my Brompton to his small workshop near Pewsey t'other day and am jolly looking forward to the results. Might even be persuaded to write a line or two on the subject, for you folks!
Nano make three options available, a ready converted, new Brompton, they'll convert your own Brompton, or else they'll simpy send you the parts. For further info, contact Lynda, nano's excellent coordinator. She does, as they say these days, Great Comm.s lynda@nanoelectricbikes.co.uk
ttfn, Simon in Easton
(currently enjoying a Moulton TSR & a nano Brompton...)

User avatar
[XAP]Bob
Posts: 16896
Joined: 26 Sep 2008, 4:12pm

Re: Brompton Electric. Game changer?

Postby [XAP]Bob » 29 Aug 2017, 10:30am

Gattonero wrote:
Randy_Butternubs wrote:...Hopefully Brompton will keep the connector block standard so that owners can buy the new, better batteries in the future.


They are known for keeping their bikes serviceable during time. That's why I bought one 8)


And given that it looks like they have used the existing luggage block as a basis for the connector then there is no benefit to futzing it...
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

ChilledOut
Posts: 7
Joined: 2 Jun 2017, 8:36am
Location: Co Durham

Re: Brompton Electric. Game changer?

Postby ChilledOut » 28 Dec 2018, 8:59am

It would be great for any members who have had electric conversions posted how successful the different conversions have been.
I bought an actual electric Brompton which had to go back to the factory for, allegedly, a new motor and controller as the power kept switching on and off going uphill. It was returned worse than it was before it went back to the factory, so I got a full refund.
So please...... post how the different conversions are working for you!
Last edited by ChilledOut on 9 Jan 2019, 8:53pm, edited 1 time in total.

Marc
Posts: 58
Joined: 18 Aug 2016, 6:03pm
Location: Hamburg, Germany
Contact:

Re: Brompton Electric. Game changer?

Postby Marc » 30 Dec 2018, 10:09pm

Buk wrote:With one of these for £200 and one of these £190 and the cost of rebuilding a wheel to the hubmotor, and a standard Brompton, you get something like this 'cept neater and lighter and 2-speed which is great for hills, and save around £1000.

Nice idea! Shame it doesn't work.

Bromton use 75mm wide front wheel hubs and have 8mm wide dropout slots in the fork, hence the usual 100mm wide front wheel hub motors with 10mm axle simply don't fit.
Last edited by Marc on 31 Dec 2018, 12:28am, edited 2 times in total.

Marc
Posts: 58
Joined: 18 Aug 2016, 6:03pm
Location: Hamburg, Germany
Contact:

Re: Brompton Electric. Game changer?

Postby Marc » 30 Dec 2018, 10:20pm

Grin Tech in Canada offers Bromton Pedelec conversion kits based on two small Cyctalyte direct drive hub motors: https://www.ebikes.ca/product-info/brompton-kit.html Since these are direct drive hub motors, they even sport regenerative braking with the included controller.
The info page got nice images, explains some quirks (compared to normal Pedelec conversions) and has an installation guide.

Since the hub motors are modeled in their online Ebike Simulator, you can calculate how fast your electrified Brommi would go with either of the motors, compare how well they will climb hills and what range to expect from your battery: https://www.ebikes.ca/tools/simulator.html

The actual conversion kits are here: https://www.ebikes.ca/shop/electric-bic ... -kits.html
I'd advise to spend the extra $20 for the Statorade upgrade, even if you don't live in a hilly area. That stuff works as advertised to keep the hub motor a great deal cooler, without adding noticeable drag (if done right): https://www.ebikes.ca/product-info/statorade.html

That's a conversion kit worthy of this little smart bike, designed by one of the leading ebike pioneers (no exaggeration if you know who Justin Lemore is and what he done) and converts your Brommi at least to the same quality level of the Bromton Electric (assumed its any good, of course). If you choose the optional Cycle Analyst, it's most likely the better kit (I'll never build an other ebike without a CA).


I'm not affiliated with Justin or Grin Tech. Just a happy user of their products (paid from my own money) and fancy myself as one of their 'beta testers' (Cycle Analyst v3, Satiator, Phaserunner, Statorade).