powerfull conversion kit for off road mtb

lanerboy

Pedelecer
Sep 2, 2016
43
4
55
midlands
Hi All

I have recently installed a 250w rear wheel kit form oxydrive to my wifes bike and its a nice bit of kit for what she needs and I now want to do my bike, my bike is a Scott 660 mtb and I am after a more powerful rear wheel kit to use when I am off road on the tracks etc that I ride in Wales which is private land where I also ride my KTM enduro dirt bike.

I have seen 750w rear wheel kits on ebay but have not got any feedback on them can anyone recommend a decent powerful rear wheel kit that I can fit to my Scott mtb with discs brakes

Many Thanks

LB
 
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D

Deleted member 4366

Guest
The cheap 750w direct drive kits that you can find on Ebay are not bad for commuting, where you want to sustain a high constant speed on flat roads. The downside is that the motors are heavy and lack torque. If you want to use one on the road, only get one that has a LCD and pedal sensor.

For off-road use (not jumping) and hilly roads, a 500w geared motor at 48v would be much better. A crank-drive motor would also be good for that if you don't mind all the gear-changing.
 
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lanerboy

Pedelecer
Sep 2, 2016
43
4
55
midlands
The cheap 750w direct drive kits that you can find on Ebay are not bad for commuting, where you want to sustain a high constant speed on flat roads. The downside is that the motors are heavy and lack torque. If you want to use one on the road, only get one that has a LCD and pedal sensor.

For off-road use (not jumping) and hilly roads, a 500w geared motor at 48v would be much better. A crank-drive motor would also be good for that if you don't mind all the gear-changing.
Hi and thanks for the reply
Regards a 500w geared motor do you have any advice on make and model that I should look at
Thanks LB
 

soundwave

Esteemed Pedelecer
May 23, 2015
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you can get good torque from a hub motor but not these low wattage ones and yes 750w is low power;)
 

Nealh

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Aug 7, 2014
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D

Deleted member 4366

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The 36v 201 rpm Q128H with the 48v battery that includes a 20A simewave controller makes a light but powerful combination. If you have a nice bike with cassette gears, then the 48v 328 rpm Q128C would be my choice.

https://bmsbattery.com/ebike-kit/769-q128c-135mm-500w-rear-driving-ebike-hub-motor-wheel-ebike-kit.html

https://bmsbattery.com/ebike-kit/776-q128h-48v800w-rear-driving-e-bike-motor-wheel-ebike-kit.html?search_query=q128h&results=2

https://bmsbattery.com/ebike-battery/680-48v116ah-bottle-09-panasonic-battery-pack-battery.html

When choosing a hub-motor, you have to match the RPM and voltage to the speed you want to go. 201 RPm in a 26" wheel will max out at about 17 mph. 328 RPM is about 26 mph. By running a 36v one at 48v, it will go 4/3 faster.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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My Q128c marked as 20lrpm, top end ranges from 21 - 26 mph dependant on the assist level using 10s lipo on 26" mtb with knobblies.
 
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Deleted member 4366

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My Q128c marked as 20lrpm, top end ranges from 21 - 26 mph dependant on the assist level using 10s lipo on 26" mtb with knobblies.
At what voltage are you using it, and what's its nominal voltage for 201 rpm?
 

D8ve

Esteemed Pedelecer
Jan 30, 2013
2,142
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Bristol
10s is 36 volts nominal. 42 fresh off charger.
That's what I'm using as well :)
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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At what voltage are you using it, and what's its nominal voltage for 201 rpm?
Nom is 36v charged to 41.5/6v.
I think 1boris questioned the rpm rating last year on his 128h hence the speed achieved.
 
D

Deleted member 4366

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26 mph is 328 rpm. They must have sent you the wrong one. The 201 rpm one struggles for 17 mph at 36v.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
19,991
8,173
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West Sx RH
26 mph is 328 rpm. They must have sent you the wrong one. The 201 rpm one struggles for 17 mph at 36v.
If ? That is the case then the hubs are marked wrongly with the rpm.
 

lanerboy

Pedelecer
Sep 2, 2016
43
4
55
midlands
The 36v 201 rpm Q128H with the 48v battery that includes a 20A simewave controller makes a light but powerful combination. If you have a nice bike with cassette gears, then the 48v 328 rpm Q128C would be my choice.

https://bmsbattery.com/ebike-kit/769-q128c-135mm-500w-rear-driving-ebike-hub-motor-wheel-ebike-kit.html

https://bmsbattery.com/ebike-kit/776-q128h-48v800w-rear-driving-e-bike-motor-wheel-ebike-kit.html?search_query=q128h&results=2

https://bmsbattery.com/ebike-battery/680-48v116ah-bottle-09-panasonic-battery-pack-battery.html

When choosing a hub-motor, you have to match the RPM and voltage to the speed you want to go. 201 RPm in a 26" wheel will max out at about 17 mph. 328 RPM is about 26 mph. By running a 36v one at 48v, it will go 4/3 faster.
I am looking at buying a full kit from these guys as recommended by d8veh kit will be around £500 mark inc battery but does anyone know if I will be liable for import duty / tax and if so how much would this be ??????

Thanks LB
 
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