Author Archives: leafmotor - Page 2

Order inquiry for bike motor and spokes

Posted by leafmotor on August 30, 2023 Comments Off

Q: I am looking for a rear hub motor, however I can not find in your website. I need a rear bike motor installed in the rim. My rear wheel tire is 27.5” x 2.4”. I am looking for only 1000w 48v.
If you have in stock, please send me the link so I can go forward with a purchase.

A: Please click below site.
Rim is 32mm width. Fit for 27.5 x 1.95″ ~ max 2.4″
https://www.leafbike.com/products/e-bike-hub-motor/27.5-inch-48v-52v-1000w-rear-bike-motor-wheel-1374.html

Q: Thank you for your response. I have a question for you. What is the sprocket type? I am looking for a freewheel sprocket.

A: Default: freewheel

Q: Before I begin to purchase a new hub motor I want to mention something. 4 years ago I ordered a 48v 1000w 700c rear wheel bike motor e bike kit from leaf bike, and I still have it till this day….I enjoy using it and I am having a lot of fun with it and I want to keep it….I recently ordered a brand new bike and I really want to exchange my original e bike kit into my new bike, however my new bike is on a different size rim (27.5” x 2.4”).
I have begun this project of mine and I am facing a problem with my spoke install. I ordered 36 x 170mm spokes from a bike store, installed the 1st and 2nd set of spokes easily, however, to do the 3rd and 4th set is impossible as I can not reach the rim hole. I noticed on your website that size 170mm spokes are the correct size length, they are 12 gauge, I followed the exact same spoke pattern as the 700c wheel, yet I have no success. What am I doing wrong?

A: 700c rim is about larger than 27.5 inch
27.5 inch is a little than 26 inch

48V 52 V 2000W motor kit

Posted by leafmotor on August 29, 2023 Comments Off

Q: The 2000w bike conversion kit arrived safe and sound. I wonder if you would explain to me some of the wire connectors are for. What I should set
-U02 Power Watt Max 1000W default or 2000W hub motor
-U03 What is power gear? Saved, Gear 1,2…
-P07 Speed magnet number?24 ,36,48?
-P14 Current Limit? 30A-40A?
After I install the brake Cut off sensor I have E2 error what wrong
What are 2 blue wire connector for? 2 5 Pin connector at motor I use either one They work fine So what is the extra 5 pin connector for?
Please help me to make it work right.
The speed I got 86 kmh on 48V 15ah battery

A: U02 – You can set it as your hub motor power (Don’t set)
U03 – Don’t set
P07 — 46
P14 — You can set 30A or 40A. (Less current is bigger for controller) You can set 30A first, then ride or uphill, if good. That’s good. If not good for uphill, set it to 40A.

E2 – Your brake lever or sensor is braking. (Cut off motor power, at this time, motor can’t work)

Two blue wires are used for: look for phase wire, look for correct working way. If can’t work. Connect these blue wires together. Controller can look for right working way by itself.

5 pin extra — 2 sets of 5 pin extra are the same. They are connected to 2 sets of hall sensors. If one hall is broken,motor can’t work.
Just use the other 5 pin plug then can solve motor hall issue.

Q：Would you help me with the E7 error code after 2 blue wire connected
Is the hub motor failed? After connect 2 blue wire together I got E7 and motor stopped working. I worked fine I got 90kmh after I follow your instruction.
So what now?
The hub Motor and the speed controller work fine so far just a minor issue with the light wire (red+black)from the controller that does not work
when I connect it with my e bike rear light ,and there are 2 wires (red+white) from display What are they for?
Would you help me with bike conversion kit. If I succeed to upgrade my e bike I may do upgrade for my friends.
I will properly need you with more orders.
It worked now. THANKS

Looking for bike conversion kit

Posted by leafmotor on August 27, 2023 Comments Off

Q: I am looking for support, when it comes to finding the right bike conversion kit:

My requirements are:

E-Motorcycle Maxi (50ccm motorbike, Photo attached):
Total weight (driver 80kg +bike 34kg + battery 48V/20Ah 7kg + hub motor 9kg +controller 1,5 kg): 131,50 kg –> weight of components are just an estimation!
Hub motor must be mounted on a 1,35 x 17″ rim with spokes.
Cont. Wattage of Hub Motor: as high as possible! around 3000 W ideal
max. vehicle speed @ lowest battery voltage (40V) @ 0 climb angle (13 x 3,1V = 40V): 60 km/h
max. climb angle: 8-10 %
max. swing arm dropout: 138 mm
thickest axle diameter: 12 mm (see reference picture)
Battery
Nominal voltage: 48V
Peak Voltage (fully charged): 54,6V
min. Capacity: 20 Ah
Range –> unknown as this will be tested with first kit
Controller must be programmable (V max limit changeable, phase current changeable if possible)
48V system fit to hub motor

A: Thanks for you are interested in our products.

Please below link. These 17 inch bike conversion kits are fit for you.
https://www.leafbike.com/products/electric-motorcycle-kit/17-inch-electric-motorcycle-wheel/

Q: Can you please send me data sheets to the strongest hub motor and a mechanical drawings.
A:If need to stronger, replace this stronger controller. We can make this kind of 17 inch, just replace a rim.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/26-inch-2000w-5000w-high-power-rear-hub-motor-bike-conversion-kit-992.html

But this 2000w hub motor is fit for 170mm or 190mm dropout.

Q: I cant use this hub motor as the dropout is too big.
Looking for a hub motor with max 138mm dropout. Whats the strongest you can offer?

Please send me data sheet, test curves and mechanical drawing of the hub motor

A: If need to install sprocket / Chain, max use 1500w motor.If don’t need to install sprocket / Chain, max 2000w motor.

Q: Please send me datasheet, test curves and mechanical drawing of the 1500w hub motor.

60V 30AH electric bike triangle battery Custom

Posted by leafmotor on August 26, 2023 Comments Off

Q: I’m interested in this 60v 30ah lithium battery but I have 2 questions. My controller has a max BMS of 45 and I see that this battery is rated for 30. Would that be an issue? If yes, can you guys increase it? The second question is that I like the size of this electric bike battery because it fits my frame. I was wondering if you can increased to amp hours from 30 to 35-40, without changing the battery size? I’d like to increase my range as much as possible. I don’t know if this is possible but I thought I’d ask.

A: 1. Your controller Max 45. — It’s fit for. We can make battery’s BMS to max 40A or 50A
2. Yes, we can increased the Amp hours from 30ah to 35-40. If without changing the battery size. (Also, can supply your frame size to us. We can customize as battery as your frame.)

Q: I’m not quite sure which measurement is for the frame size, so I’ll just send 2 different ones, followed by a picture so you can see where I got them from. From the middle of the crank to the top of the seat it’s 17 inches, and from the middle of the crank to the horizontal top bar, it is 14.25 inches. However, I made a cardboard cut-out based on the dimensions provided on your website found out it’ll fit well. What’s the maximum amp hours that you can fit in a battery that size?

A: We can make 60v 30ah fit for this frame. (maybe 60v 35ah, 40ah)
If we can get actual size of this frame,then we can ask our factory to estimate max amp fit for this.

Q: Going in a clockwise direction, the measurements are listed below:
444.5mm (across the top) X 571.5mm (bottom bar) X 279.4mm (vertical seat tube).

Leaf Ebike Kit Questions

Posted by leafmotor on August 4, 2023 Comments Off

Q: I would like to purchase a 27.5″ electric hub motor kit that fits in 135mm dropouts and I have a 72v (20s) battery capable of 80A continuous that I would like to use. Several questions please:
A. Can I buy a 27.5″, Freewheel, Rear, Wide Rim, kit that fits in 135mm dropouts with the “2000W ~ 5000W programmable controller” instead of the controller that normally comes with the hub motor kit and if yes, what would the total price of the hub motor kit be before shipping cost are added?
B. What is the internal width of the widest 27.5″ rim you have available?
C. Can I get the 5mm phase wires with the motor configuration I specified in “A.” above? If yes, how much would it change the price? If no, what are the largest diameter phase wires I could get?
D. Do all Direct Drive Leaf motors now use the .035″ thick laminations? I would definitely want them.

A: A. 135mm dropout – max make 48v 1500w rear bike motor,see below drawing. no room to make 2000w motor. (This 48v 1500w motor with 3mm phase wire can work with 48v or 52v or max 60v)
https://www.leafbike.com/u_file/2301/01/photo/1500w-rear-bike-motor-drawing_53f4287594.jpg

But, if no freewheel, not pedal, can make it to be 48v 2000w front bike motor(see below drawing) that fit for 135mm dropout and can use “2000w~5000w programmable controller”
This 48v 2000w motor with 6mm phase wire can work with 48v or 52v or 60 or 72v batteries.
https://www.leafbike.com/u_file/2301/07/photo/2000w-front-beach-snow-fat-bike-motor-drawing_bbdbc1e4ce.jpg

We have three kinds of 27.5 inch rim, one is 23mm width, the other two is 25mm and 32mm width. (Max 32mm width)

If 26 inch, we have 25mm, 32mm, 80mm width rims.

B. Our 27.5 inch 32mm width rim, internal width is 25mm

C. 48v 2000w can use 5mm or 6mm phase wires. (But 48v 1500w max use 3mm phase wires.

D. All of our motors use .035″ thick laminations

Q:
Two more question regarding the “48v 1500w rear bike motor” phase wires:

A. Are the phase wires 3mm in diameter or 3mm in cross sectional area?

B. Is the 3mm dimension for the actual copper wire or the overall including the insulation?

18 inch electric motorcycle hub motor kit

Posted by leafmotor on April 13, 2023 Comments Off

1. The rear wheel diameter is 18 inch motorcycle motor kit and the rim width is 2.75inch (70mm). Thank you, it would be great if I could get the same rim with the hub motor. In case, this causes problems, I think a 2.5inch rim width should also work.

2. The hub motor that makes 50mph (i.e. the one that you describe in the 1.8-16inch 2000w hub motor) sounds great for me. Do you have a more detailed sheet on it, i.e. the torque, rpm etc?! I would like to go with this one then.

3. Great, thank you. Do you have more details on the dimensions of the shaft (diameter and shape) such that I could already start checking how I can mount it in my swing arm.

4. Sounds great, so this will be my option of choice.

5. Okay, I will need the brake to be on the left side, so this is my option of choice, thanks.

6. How much more would be the 60V battery and can you estimate the enhancement in power of the 18 inch electric motorcycle motor kit? I think 52V will be fine for me, but just to know.

7. Thank you, so there will be no additional custom fees when shipping it to Finland?

Finally, how can we proceed with the ordering once all remaining open questions are solved as I cannot use the products from the web shop directly due to the special needs?
How long will be the lead time roughly?

I will go with the 1.85-18 rim then and I guess with the 60V battery.
I will mention all as you explained, thank you.
Before ordering, I will have to figure out some minor detail so i guess I will place the order some time next week.
Looking forward to have the engine.

29 inch electric hub motor kit

Posted by leafmotor on April 12, 2023 Comments Off

Q: If I buy 29 inch electric hub motor kit, for the real wheel, will the cassette of back wheel fit together with the our wheel? Cassette i mean the component, where the chain goes to change speeds. I am afraid the motor plus the cassette will not fit the bike. Our electric motor kit, fits 29inch x 1.95 but does it fit 29inch x 1.35?
I am interested in buying a new bike and adapt it because if will be have a better cost/performance/quality ratio, than buying strait electric bicycle. This what I am interested in,it is a carbon fiber frame 2k, their cheapest electric mountain bike was an allow frame, 400w motor and costs 2.7k, so plus 700 dollars, allow frame and only 400w compared with ours kit.

A: Not comes with cassette. It’s standard size. ONLY 7 speed cassette fit for our hub motor. Our 29 inch motor wheel is fit for 29 x 1.95″ tire and 135mm dropout.

Q: I can buy the front wheel kit instead, few months from, still need to buy the bike first.

A: Front wheel kit is also good.

Q: https://www.leafbike.com/products/diy-bike-conversion-kit/29-inch-48v-52v-1500w-rear-wheel-electric-hub-motor-kit-1065.html
Does this kit come with battery? Also ” Freewheel / Cassette: space for single speed..6 speed or max 7 speed”
I want the version sprocket with cassette not freewheel.
Can you tell me the size off the sprocket?
The cassette from the bike i want is 40.9mm and 12speed, just 8 or 9 mm more than the standard 7 speed cassette.

A: Not come with battery. Cassette is standard size. As we knows,only one. Ours is fit for 7 speed. Not fit for other 6 speed.

Q: If I know the exact size of the sprocket i know if the cassette will fit, in the kit, if not i can put the motor on the front wheel, which fits the sizes?

A: But it’s not fit for 135mm dropout，install 7 speed on this motor. Your dropout should be 137mm.If 12 speed.Your dropout should be more than 145mm.Mount bike,max 7 speed. 7 speed is fit for your rear fork. This rear motor isn’t fit for front.

18 inch electric motorcycle conversion kit

Posted by leafmotor on April 12, 2023 Comments Off

I am interested in the electric motorcycle conversion kit you offer. I am electrifying an old Kawasaki KE 125 (1976) and would require the fitting electric hub engine for the rear wheel and all other components (controller, battery, brake). Before I can order, I have a few questions:

I would need a 18inch rim (at least 2.5inch wide as shown in one photon in this kit https://www.leafbike.com/products/electric-motorcycle-kit/1.6-18-inch-48v-52v-1500w-rear-electric-motorcycle-motor-kit-1275.html?VariantsId=10576 , but it could also be wider as there was a 2.75 inch rim installed before). However, as for the hub motor, I would like to have a 2000W motor with max speed 50mph as described here for a 16inch rim https://www.leafbike.com/products/electric-motorcycle-kit/1.85-16-inch-48v-52v-2000w-rear-electric-motorcycle-motor-kit-1272.html?VariantsId=10413. Is that possible?

Do you have a faster hub motor in a motorcycle kit too?

The drop out would need to be 215 mm. I measured 200mm between the swing arms (inside to Inside distance) and 215mm at the outside (outside to outside distance). Is that possible? Or is there another way to adjust it?

I assume that when buying the kit, this means that I only have to install it but the rest fits together already?

How much more would be to get the color display LB08HU instead of the standard LCD-S830?

In addition, I would need the disk brake to be mounted on the left side with your motor flange (https://www.leafbike.com/products/electric-bike-parts/motorcycle-disk-brake-pads-rotor-flange-1252.html) such that I assume that the cable location should be on the left?!

I would also order the disk brake set for motorcycles that you offer (https://www.leafbike.com/products/electric-bike-parts/180mm-motorcycle-disc-brake-1056.html) and a battery.
For the battery, I am wondering how much of a difference the 52V (https://www.leafbike.com/products/lithium-battery/52v-20ah-lithium-battery-1224.html ) compared to the 48V makes in terms of performance of the hub engine?

How much would cost in total incl. shipping?
The shipping would be to Finland. How does it work with the customs? Do you have any information and experience with shipping it to the EU?

Inquiry Hub bike motor

Posted by leafmotor on February 20, 2023 Comments Off

Q: Cengalo is a Startup for a 4 wheeled lightweight car with 2 bike Hub motors on the rear wheels.
We plan a speed of approx 75 Km/h, downhill, with 20 inch wheels.
Can you offer the 48V 52V 1500W front spoke hub motor – electric bike motor with appox 800 rpm?
Motor type: brushless bike motor
Voltage: 48V / 52V
Power: 1500W
Max efficiency: 90.5%
RPM: 600
Mechanical brake: V
Cable location: shaft end, Left
Cable length:150cm / 60″
Install: spacing of 100mm fork
Noise: < 60 db Surface: Black painted Net weight: 6.9kg / 15.2 lbs Gross weight: 7.8 kg ( after packing ) A: 48V 52V 1500W front spoke hub motor - electric bike motor with appox 600 rpm. It's very fast. (Default the fastest) But also, we can make faster bike motor (over 700rpm) Q: The higher speed hub motor can be interesting for the vehicle. Than we can use 48V battery. We have yet to decide if the vehicle is 48 or 72 volts batteries. With the higher voltage (72V) battery, the same hub motor would have a 1.5 times higher speed. Do you have experience what is better for the car? A: This 1500w bike motor max use about 2.5mm phase wires. Can work with 72v battery. But uphill,if cable too hot,should stop at once. Q: Can you give a wholesale quote for the 1500W front spoke hub motor 100 psc / 500 pcs / 1000 pcs per order? We calculate the Cangalo Smartcar with this offer. Unfortunately we can't place an order until 28.2. We have to develop the vehicle, Cengalo Smartcar, first. You always answered quickly and hopefully will continue to do good prices in the future, so we can well imagine ourselves with Leafbike as a long-term supplier work.

motor controller cut off voltage

Posted by leafmotor on February 8, 2023 Comments Off

Each motor controller has min cut off voltage and max working voltage.

For example:
48v Controller’s cut off at 40v. Less than 40v, not work.
36v Controller’s cut off at 30v. Less than 30v, not work.

For 48v electric bike motor kit system.We recommend reach set cut off voltage to over 42v by LCD. Less than 42v,should charge battery. It’s good for battery.

These days,all kinds of lithium batteries was made by 13 series connection or 14 series connection cells to be 48v, 52v.

Each cell – min about 2.8v , max about 4.2v
13 series – 4.2v x 13 = 54.6v
14 series – 4.2v x 14 = 58.8v

Overdischarge and overcharge both Not good for battery.
For example: if set it to 40v (controller’s cut off voltage is 40v)

2.8 x 14 = 39.2v (about 40v)

If 14 series connection cells ‘s min voltage to be 2.8v at the same time. That’s good.

But ride half a year, cut off voltage still 40v.
If No. one cell ‘s min voltage is 2.7v, second is 2.9v, third cell is 2.9v….
Total voltage is 40.4v ( 2.9 x 13 + 2.7v)

If first cell’s voltage to be 2.7v, it’s overdischarge, battery can’t to be charged. Battery is broken.
So we recommend charge battery when it reach about 42v or over.

If min 42v
No. one cell ‘s min voltage is 2.9v, second is 3.0v, third cell is 3.0v….
Total voltage is 41.9 v ( 3.0 x 13 + 2.9v)

New battery doesn’t have this issue. If ride 1-2 month, we recommend charge battery @ 42v or over.

For example: cell phone, only leave 20%,need to charge. If use out all that will break cells, also very hard to charge.

So we recommend set cut off voltage by LCD that over controller’s cut off voltage.

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Leafmotor

Brushless hub motor丨e-bike conversion kit丨BLDC motor