Bafang Motor Kits In US

[Teaker68]

Does anybody know who sells the Bafang Motor Kits here in US? I'm debating between a 48V500W?

I am debating between a the lower RPM and Higher RPM Kit, going to be mostly used for dirt trail riding and some asphalt as well, any input from people with experience would be greatly appreciated.

Going to be using a 48V 10AH battery and I'm about 6'180 on utilizing a hard tail and 26" wheel.

I have read through some of the past forum posts and saw mixed reviews. Eventually would like to get a full suspension bike.

Thanks in advance!!!!

 

[dogman dan]

I'd be able to kill a smaller gearmotor dirt riding in no time at all, regardless of the winding. Quicker if it was the fast winding.

But that depends on how you ride, and how steep those trails are. I did lots of dirt riding on easy trails with a small fusin gearmotor. If you get the slow winding motor, and pedal enough to ride up the hills above 12 mph, you'll be ok.

Mac 12t would be a better choice. But heavier of course.

 

[Teaker68]

If I went for a 48V15AH battery would you think I would be better off with a lower RPM motor? I read somewhere on here you can disconnect the sensor wire to gain more top end for regular commute riding.

Also looking for range of course if anybody owns these motors would be appreciated.

 

[d8veh]

Get a 36v 201 rpm one. Should do about 24mph at 48v, which is about right for its power. The kit from BMSBattery works well. The controller is switchable between 36v and 48v, so everything will work with your 48v battery.
http://www.bmsbattery.com/ebike-kits/347-bafang-350watts500watts-bpm-motor-e-bike-kit.html

Get an extra half-throttle without switch and LEDs because they fit most bikes. Also get a torque arm and, if you have cable brakes, a pair of those hidden wire brake sensors.

 

[Teaker68]

Would I be better off getting the 48V500W kit @201 RPM since they are the same price? Or will I lose some top end speed? The battery back I'm now looking to get is the 48V10AH Samsung lithium ion. What are your thoughts on that? My bike does have the cables for front and rear disk brakes.

 

[d8veh]

Would I be better off getting the 48V500W kit @201 RPM since they are the same price? Or will I lose some top end speed? The battery back I'm now looking to get is the 48V10AH Samsung lithium ion. What are your thoughts on that? My bike does have the cables for front and rear disk brakes.

Definitely not unless you like going very slow. 201 rpm =15 mph in a 26" wheel. A couple of people on this forum have bought them before and been disappointed. You could order the 328 rpm one, which does about 25mph. The choice comes down to: 48v 201rpm for 16mph; 36v 201 rpm at 36v 22mph; 48v 328 rpm for 26mph. They all climb well. but there's a trade off between speed on the flat and efficiency when climbing. If you have too high a speed winding, the motor will get hot when climbing.

The Samung cells (ICR18650-22P) are finding their way into more and more batteries. They work well up to 3C, so 10aH should be OK although a slightly bigger battery would be better.

The ebrakes supplied in kits are OK, but if you have integrated brakes/gear-changers, or you have nice brake levers that you want to keep, the "hidden wire" inline brake sensors are necessary.

 

[Teaker68]

No, don't like going slow was kind of looking for the best of both worlds that's why I was going to order the 36v500w 201 and use a 48v10ah battery to power it. Assuming from your last post I would get 24mph not KM. Going to be doing a lot of dirt path riding and found the Outlaw SS I had owned was not cutting it at all. It did 28mph but had no torque what so ever.

Saw some of the builds you had done Excellent !!!!!

So all in all your saying I'm better off with the 36v500w 328 RPM?

Thanks for everything !!!!!

 

[Teaker68]

This was the battery I planned on using.

Packing list:
1. 1Pcs 48V10Ah LiFePO4 aluminium shell ebike battery pack. Inlcuded 16s polymer cells, 1pcs 15A continuous discharge current capacity balancing BMS.
2. 1Pcs 48V2A LiFePO4 battery aluminium shell charger EMC-120.

Specification:
1. Normal Voltage:48Volts.
2. Dimension: 69mm X 148mm X 355mm.
3. Capacity: 10Ah.
4. Charge Current: 2Amps.
5. Maximal Continuous Discharge Current: 15Amps.
6. Maximal Discharge Current: 30Amps.
7. Overvoltage Protection: 58.6Volts.
8. Undervoltage Protection: 32Volts.
9. Lifecycle: 2000Cycles.
10. Weight: 4.9Kg.
11. Chemical: LiFePO4.

LiFePO4 48V2A aluminium Shell Charger EMC-120 Specification:
1. AC Input Voltage: optional.
2. Charge Voltage: 56.8Volts.
3. Charge Current: 2Amps.
4. AC Plug: Europen Standard or American Standard.
5. Power: 120Watts.

 

[d8veh]

36v 201 rpm is the one you want. At 48v it then becomes 270 rpm. Add about 10% for actual battery voltage being higher than nominal and your actual no-load speed will be about 300rpm. On the road speed would be about 270 rpm max which is 22.5 mph in a 26" wheel. You can get another 2 mph by connecting the black and green three-speed-switch wires.
The 328 rpm one would spin at 500rpm with 48v, which is much too fast.

That battery is right on the limit. The controller will draw 30 amps. You could get BMS cut-offs on very steep hills. A bigger battery would be better.

 

[Teaker68]

Now I just got more confused and emailed BMS to put hold on order. I ended up ordering the 48v500w because everybody was saying I was only going to get about 15 MPH top and didn't want too much torque to the point where front wheel was going to be coming up when climbing bumpy off road trails. But don't want battery cutting off on me when I'm out 10 miles in woods either.

Going to respect what you guys have to say, please any input.

Thanks for everything !!!