For anybody who wants to know exactly what Duncan is asking about:
www.brompton.com/bikes/brompton-electric
No personal experience and while I've observed odd one in street I don't think I've seen one on a club ride where I could talk to the rider. There have previously been conversions of which the one by Kinetics was best known. There are one or two guys regularly on the Origami rides* who've got that or done a 'home build. These have a 'throttle' rather than the sophisticated torque sensor on the real thing.
NB Brompton do not offer an electric conversion.
It came out about the time we were sorting out Mrs B's Brompton in summer 2018. The demonstrator model at Brompton Junction in Covent Garden was attracting keen interest and had several outings in spite of England having a World Cup match on at time.
As of now I'm perfectly happy pedalling as I've always done. The cycle bit of my commute is only around a mile with no serious gradients. I'm comfortable doing the 20-30 miles of an Origami or London Brompton Club ride. These days I'd regard 50 miles as limit for a day and at that level I'd be stretching battery life on the electric.
If my needs change I'd certainly have the E-Brompton on my list. The fold is exactly same as the pedal versions and is streets ahead of anything else. The only other models that get near are a few Dahon/Tern machines.
There's a pretty positive review by Cycling UK (ie the CTC) here:
www.cyclinguk.org/cycle-magazine/bike-test-brompton-electric-e-bike
They describe it as an electric folding bike whereas most/all rivals are electric bikes that fold which is probably as good a summation as you'll get.
*www.foldsoc.co.uk/origami/
Last edited by: Bromptonaut on Fri 17 Jan 20 at 10:45
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