Are these electric turbo bike kits with 4 inch wide wheels any good ?
I know I would have to run a chain from a motor , but could they possibly be a bit fragile for a two seater .....
8kw motor for on a wheel for a couple hundred quid isn't such a bad price...
Do you have any links? From everything I've seen posted about these so far, most people seem to think they are snake oil - I can certainly see a
problem with supplying 8kW to anything on a 12V system for any length of time - even assuming 100% efficiency 8kW at 12V is around 667A! 
I believe there are some that run from their own batteries, but, again you'd need much higher voltage to drop the current down to more manageable
levels. Also £200 for 8kW sounds very cheap, are they really 8kW or is that only for a matter of seconds?
http://pages.ebay.com/link/?nav=item.view&id=201513147087&alt=web
ebay seems to offer 48V 1kw electric bicycle wheels - that would be around 21A, which still seems a lot to me (bear in mind UK mains in a house is at 13A).
Ah!! All starts to make more sense, I thought you were talking about electric motorcycle turbo/supercharging kits, which, as already said appear to be
snake oil!
The description is terrible! It's 7500 - 8000W, & 48 - 120V, but gives no idea of what power output to expect at what voltage. Top speed of
125kMh, is presumably on a pushbike. I don't know who fancies doing nearly 80mph on a pushbike, but I don't! It's not quite what they
were designed for!
It's initially sounds like a cheap price for a 7.5kW motor, but by the time you add on $111 shipping it's over £350 so not so cheap, there
was a guy in UK on Ebay selling 10Kw motors for around the same money & those did have full spec, but he doesn't appear to be around any more
- there are suggestions for other motors on this thread here which may be of
assistance, depends what you are trying to do with it
http://pages.ebay.com/link/?nav=item.view&id=161952952409&alt=web
It's the above item that got me wondering about the back wheel for a reverse trike
And this one....
http://pages.ebay.com/link/?nav=item.view&id=331766587253&alt=web
3 wheel drive seems to be attractive at these prices
Cheers!
quote:
Originally posted by Volvorsport
Are these electric turbo bike kits with 4 inch wide wheels any good ?
I know I would have to run a chain from a motor , but could they possibly be a bit fragile for a two seater .....
8kw motor for on a wheel for a couple hundred quid isn't such a bad price...
quote:
Originally posted by Volvorsport
And this one....
http://pages.ebay.com/link/?nav=item.view&id=331766587253&alt=web