Forum menu
Re speed pedelecs,
nah, I wouldn’t bother.
ordinary bicycle parts are fine at the speed limiter, but when you start to go much faster they’re not up to it.
Tyres especially.
i’ve had my ebike chipped, so i can turn the limiter off, but honestly I wouldn’t bother doing it again, it doesn’t actually improve the bike, there’s practically nowhere it can be used legally, and it has a moderate effect on battery life (ie, it’s shorter)
i would say, if it was up to me, that 18mph would be an optimum speed.
geex yeah there's a whole load of factors that contribute to it, hills being no1. But my weight comment was specifically in relation to speed pedelacs for communting, I don't think there's really too much need for them to be light weight, particularly for a bike that's going to be planted to the ground, cycling on fairly tame terrain on slick like tyres, I'd say range is more preferable. But in relation to mtbs, I suspect you don't want a light weight bike to ride "properly". You'll be waiting along while for them to be coming down in weight in that respect I think, unless you are just into doing 10 mile loops and can live with a smaller battery.
Regarding speed on the battery, if you look up the efficiency charts on some of them, there seems to be an optimum level somewhere around the 20ish mph mark and slight above speed wise, where power consumption is reasonable, after you go above 25mph in particular battery usage ramps up alot.
i would say, if it was up to me, that 18mph would be an optimum speed.
tehnically 17mph is the limit. 15.5mph + 10%. 😉
They really don’t need all of this heavy shite.
Don’t really see why they have to have a drivetrain either.
build your own, get the bike you want, fire on a lightwight motor, add the minimum amount of battery you need. bingo, you'll have as light a commuter as any manufacturer will build.
btw I'm curious how you propel it forward without drivetrain?
then again mibbe not, road bikes are starting to appear
http://ebiketips.road.cc/content/reviews/electric-road-bikes/bianchi-impulso-e-road-1665
16.8kgs is no bad.
here's a 12kg one!
Ah. Ok. Sorry. dodn't realise you meant commuter bikes that can assist up to more than 15mph.
16.8kgs is no bad.
7.6kg eMTB?
240wh battery is a bit grim!
seosamh77
Unless you are just into doing 10 mile loops and can live with a smaller battery.
I'm also pretty certain I snap that in 2 in a few weeks! 😆 I'd also suggest we are talkign the consumer market here!
240wh battery is a bit grim
I think it was just to show what is possible. The bade bike is a Scott Scale. Nonetheless, he fitted a larger battery:
When he was choosing what battery pack to buy from vendors in Asia, he decided to build a custom pack that he would solder together himself from Lithium-Ion cells. When he chooses to ride with his larger battery pack that provides 800 watt-hours, the total weight of the bike increases from 7.66 kg up to 9.90 kg (21.8 lbs). With the impressive marathoner adding some athletic pedaling, the larger battery allows day tours of a distance up to 180-kilometers (120 miles), and climbing over 4000-meters (13,000 feet) in elevation. Says Schiltknecht, “In 2010, I even managed a one-day tour in Valais through the Diablerets [mountains]”.
To my mind here's lots of ways to be looking at both mountain biking and ebiking. Seems a shame to just getting closer and closer to (essentially) MX bikes with pedals with no truly lightweight options. Hats off to the man? That was ages ago too.
7.6kg eMTB?
While it shows you can go light it is hardly an eMTB is it. It is more of a hybrid commuter thing.
Basic maths really, take the lightest bike you can and just add a motor then you just have the bike plus whatever the motor and battery weigh...
While it shows you can go light it is hardly an eMTB is it
It's Scott Scale 899 XC MTB
(albeit with rigid forks and an electric motor). Even with (1.2KG) DT air forks (100mm) replaced - it would still be considerably lighter than the '16kg' electric road bike to which I was comparing, which was my point that sort of got lost. Maybe 'MTB' has become a very narrow definition of late, yet an £8k XC race bike from 2011 is still an MTB, just a very ancient, lightweight one! I suppose just like a CX bike is not designed as a 'commuter', neither is an XC bike? But you could commute on either, as well as race on them. Big air, not so much 😉
I'd think the longevity of the motor and the battery might need tested too.
Interesting enough what the auld boy has done though.