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Electric bikes - how good at hills?

(12 posts)
  • Started 11 years ago by Smudge
  • Latest reply from Roibeard
  • poll:
    Electric all the way, it'll romp up the hill. : (0 votes)
    Nah, too much to ask, just get a(nother) motorbike : (0 votes)

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  1. Smudge
    Member

    Ok here's the situation, Mrs Smudge doesn't ride bicycles, she famously fell off during her cycling proficiency and there her interest in and use of bicycles ended.
    She has however since ridden motorcycles briefly, now for various reasons we don't need to go into here, we're considering a range of travel options, one of which is an E-bike for her (as according to the Brompton Nano website pedelec is not a legal requirement in the UK and it can be ridden on a twistgrip "throttle" in the manner of a motorcycle)

    Given that we live at the top of a serious 2 mile hill, my question is, does anyone know if an E-Bike (and I'm thinking initially here of a Brompton with a Nano conversion, though it's all brainstorming at this stage) with rider and a daysack will climb hills at useable speed purely on the electric motor? (I'm planning for worst case naturally!.)
    If they can do that, do they have the "oomph" (I know, too much technical jargon;-)) to tow a child trailer as well?

    They're a nice idea, and the principle is good, but never having used one I've no real idea of the performance.

    Incidentally, we are talking purely about e-bikes within the legal limits, no high power off road specials unfortunately :-(

    Posted 11 years ago #
  2. Uberuce
    Member

    The error bars of this approach are huge, but you could point Strava to the hill and see what 250 watts gets you.

    Up Arthur's Seat, it seems to be good for a 7-8mph average.

    Posted 11 years ago #
  3. cb
    Member

    Probably worth glancing through the A to B pages on electric bikes:

    http://www.atob.org.uk/electric-bikes/electric-bike-buyers-guide-uk/

    (plus pages linked from the right-hand column).

    I notice on the
    legislation page it states "The motor alone cannot be used to propel the bicycle, so power can only be brought in while the rider is pedaling"
    Seems to be a conflict between 1983 UK legislation and 2002 EU legislation.

    Re. hills note that the
    technical guide states:

    "If you are expecting to tackle very steep hills (in excess of 17%, or 1 in 6), we’d recommend a Crank Drive motor"

    Pedelecs can be problematic for hill starts as you sometimes need to get in a revolution or two of the pedals before the power kicks in.

    I should have all A to B mags from about the last 10 years so if you're interested in borrowing any for reading reviews let me know.

    Posted 11 years ago #
  4. SRD
    Moderator

    @smudge my gut reaction is that if she really wants to sit on it and not pedal, then a motorbike makes more sense. but not sure you can tow a kiddietrailer behind!

    maybe someone would let you borrow theirs and have a go? then you could judge how it would work?

    Posted 11 years ago #
  5. Dave
    Member

    They can be quite fast - I used to sometimes struggle to pass electric bikes on a couple of bits of my commute.

    The range is another question though, and I don't like the pedelec model - when you're going slowly trying to manoeuvre (say waiting for an oncoming car before turning right) the motor can kick in. I'd prefer a throttle myself (and yes, then you could certainly consider a scooter)

    Posted 11 years ago #
  6. Smudge
    Member

    Thanks for the input everyone, the alternative is probably to do the bike test and either use my bike or get wee 250 or something. I wouldn't choose a 50 for our route, worst of all worlds!
    Range shouldn't be an issue though as it's only 2 or 3 miles at each end, and the morning phase is pretty much all downhill (steep enough that it's a 40mph descent on the Surly! Yet someone on strava can allegedly average over 30mph up the hill? Yeah right!)

    Posted 11 years ago #
  7. le_soigneur
    Member

    Here is a half-way house: "The range of the unit obviously depends on how you ride and the terrain (number and steepness of hills!) – If you struggle up hills and arrive exhausted then this
    electric bike kit will make all the difference and it is great for gliding through town or along the canal. We had a great deal of fun testing them around Accrington and it is a hilly town I can assure you. It does need a little help up hills, it is not a motorbike, but we never broke into a sweat on any of the hills and we smoke and don't do much exercise!! we weigh about 75kilos and had a mornings fun when not doing much pedalling before recharging and we got a full day with the battery when pedalling too. It is up to you how you ride the bicycle, but I'm sure you'll find the best compromise between pedalling/effort/battery in a short time, to make your cycling easier, quicker and more productive."
    You can get them up to 1000W. The Pb-acid battery might not last more than one winter but if you tried it out, you could either sell-on or invest in a Li-ion battery.

    Posted 11 years ago #
  8. chdot
    Admin

  9. Smudge
    Member

    @ LeS' thanks, I'd probably go for one from alien in Fife if I go down that route. 1000w would be somewhat illegal however!

    @Chdot, good story :-)

    Posted 11 years ago #
  10. Well I saw one get to the top of the Tourmalet last year....

    Posted 11 years ago #
  11. rust
    Member

    If it's towing a trailer is there anyway to have an additional battery in the trailer that could be hooked up?

    Posted 11 years ago #
  12. Roibeard
    Member

    @rust - such beasts exist...

    http://www.ridekick.com/

    I'm sure others are available, but I wonder about the possibilities for a spectacular jack-knife!

    Robert

    Posted 11 years ago #

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