Advice on a geared hub motor kit plse

[Tetleys]

Hi could anyone recommend an ebike kit to include the following please to fit on my 700c hybrid bike. 1.500 watt geared rear hub motor that will take at least 8 or 9 cassette. 2. At least 5 levels of pas. 3. Large backlight lcd screen. 4. Must be able to use a throttle at the same time as pas mode...to give an extra boost whilst pulling off. 5 ideally would prefer built in speed controller.
I have tried a carrera crossfire from halfords. It was 75 % perfect for me and was impressed at how the 250 watt motor performed. However it got really bogged down on moderate hills and over grass and no throttle so pulling off at junctions was dangerous for me. Iam a big chap so would prefer a bit more power as i think i would burn out a 250 watt motor.
Many thanks

 

[Woosh]

Geared hub motors don't go as far as 1,500W.
The most you can get is a rear BPM kit on 700C wheel, 8-speed freewheel fitted, 15AH HL downtube battery (Samsung cells), throttle, PAS, King Meter J-LCD with 5 assist levels, sensored brake levers. £599.

http://wooshbikes.co.uk/?hubkits#rearbpmkit

 

[Tetleys]

Geared hub motors don't go as far as 1,500W.
The most you can get is a rear BPM kit on 700C wheel, 8-speed freewheel fitted, 15AH HL downtube battery (Samsung cells), throttle, PAS, King Meter J-LCD with 5 assist levels, sensored brake levers. £599.

http://wooshbikes.co.uk/?hubkits#rearbpmkit

Hi thanks for your reply But i didnt put 1500 watt motor. Its 1.500 watt motor 2. With 5 levels of pas 3. Large back light lcd etc etc. Sorry for confusion! Ive just looked at that but its only 250 watt??

 

[Woosh]

Sorry for confusion! Ive just looked at that but its only 250 watt??

that's nominal power rating for compliance.
It simply guarantees that the motor will not overheat at 250W.
What determines the capacity of the motor is the controller that is supplied with the motor. The 48V kit is fitted with a 48V 18A controller. A 48V fully charged battery shows 54V. At its maximum, the controller will send into the motor 54V * 18A = 972W. About 15% will be lost in the electrical to mechanical conversion inside the motor, you get a maximum of about 800 mechanical Watts at the rear wheel.

 

[Deleted member 4366]

48v gives you 33% more torque than 36v. I think that the Crossfire is 15 amps so 18 amps gives you another 20% torque. That means that you'd have about 50% more torque with that Woosh kit than the Crossfire. That's about the best you'll get on a UK kit. After that, you need a bigger motor, like the 500w Bafang CST or MXUS clone of it, which you have to buy from China. You can then go up to 25 amps, which will give proportionally more torque, but then you need a suitable battery, which will need higher capacity and a higher discharge rate, so will be a lot more expensive.
https://www.aliexpress.com/item/Mxus-MX01C-36V-48V-500W-Gear-Hub-Motor-For-16-28-Rear-Wheel-8S-10S-Cassette/32841637481.html?spm=2114.search0104.3.76.7ae11f72jGYxYG&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_10344_10068_10130_10324_10342_10547_10325_10343_10340_10548_10341_10192_10190_10084_10083_10618_10307_10301_10303_5711211_5722315_10313_10059_10184_10534_100031_10629_10103_10626_10625_10624_10623_10622_10621_10620_10142,searchweb201603_25,ppcSwitch_4&algo_expid=4656cff3-19b7-404b-8f0b-8e9d97b6b725-11&algo_pvid=4656cff3-19b7-404b-8f0b-8e9d97b6b725&priceBeautifyAB=0

You need to tell us how much you weigh if you want proper advice.

 

[Tetleys]

Hi thank you very much for your replies its much appreciated.

I am a large chap of 18 stone.
I do have a mtb with a 1000 watt rear hub motor, seperate speed controller and a 15ah lifepo4 battery. That i purchased from china about 8 years or more ago. Its very powerful and can take me anywhere, but its dead heavy.

I also get dead lazy on this bike as it has no pedal assist and just use the trottle. So i want to sell this kit and buy a lighter kit. Like i said the carerra crossfire was great but on a moderate hill the motor bogged down and came to a stop.

I understand what you are saying in terms of running the woosh 250 watt kit at 48 volts to increase wattage and torque etc and this seems a great compromise in terms of having a smaller motor but i am concerned that the motor or controller may burn out? Also wouldnt i just be better off with say a 500 watt geared motor and the same 48 volt battery to avoid over heating a 250 watt motor? Many thanks.

 

[Woosh]

I understand what you are saying in terms of running the woosh 250 watt kit at 48 volts to increase wattage and torque etc and this seems a great compromise in terms of having a smaller motor but i am concerned that the motor or controller may burn out? Also wouldnt i just be better off with say a 500 watt geared motor and the same 48 volt battery to avoid over heating a 250 watt motor? Many thanks.

you shouldn't run a 36V SWX02 kit at 48V. It's not going to last long.
The 48V SWX02 kit has a slow winding in the motor, 30% more turns of copper on each pole. You get 30% more torque but the motor runs about the same speed as the 36V SWX02. No load speed for both kits is 23-24mph.

 

[Tetleys]

Hi
Thank you once again for your advice.
I understand it now and it makes perfect sense. I thought you meant over volt the 250 watt motor!
in terms of torque or power you say that this motor is roughley 800 watt at the back wheel....so am i right in thinking that this geared motor at only 250 watt will only be about 20-25% less powerful than my 1000 watt non geared hub motor that does 30mph? Basically what am looking for is a lighter setup i dont need top speed of 30mph. Be nice to be able to go around 20 mph instead of the limit of 15mph as i dont want the motor to cut out if am going faster than 15mph. I also need a larger screen lcd screen( do u have upgrades) as my eyes are not great, 5 levels at least pas. Plus thumb throttle, a downtube battery pack with built in speed controller and would also need a prefebley a black motor along with a black rim 700c wheel to match my bike?
Many thanks

 

[Tetleys]

Oh sorry the motor also needs to be able to accomodate a 9 gear cassette. Iam aware you only do 8. But i would need to be able to fit a 9 gear cassette as ive tried the crossfire with 9 gears and it was perfect in terms of gearing. Ive also tried an 8 gear bike and it wasnt gearing high enough for me.

Thanks

 

[Woosh]

I also need a larger screen lcd screen

The LCD is by King Meter (a Bafang company) model KM529

it's very readable with the backlight on (press and hold the + key for 2 seconds).
Manual for the KM529:
http://wooshbikes.co.uk/manuals/KM-529-LCD-Display.pdf

so am i right in thinking that this geared motor at only 250 watt will only be about 20-25% less powerful than my 1000 watt non geared hub motor that does 30mph?

you are correct. The top speed of your old kit is higher but the torque of the SWX02 is higher.

would also need a prefebley a black motor along with a black rim 700c wheel to match my bike?

the rim is black but the motor casing and spokes are silver.

 

[Tetleys]

Hi
Thanks but re the lcd is too small and will struggle to see it. I need one abt same size of the ones that come on the bafang middrive kits. Also would like a side operated throttle rather than push down as these are not comfortable so my question is . Can you remove these items from your kit and supply me with the items i need? I dont mind paying for the upgrade if this is required.
Thanks

 

[Woosh]

the KM529 is larger then the J-LCD, about the same size as the C961 that comes with the Bafang BBS01B/BBS002B kits.