Bafang BBS02

Stay away from the 52T. I prefer the 44T. Lot's of grades to climb? If so consider even smaller.
 
Most often you wil need a 44T or rather a 42T "Bling ring".

The big chainring on a normal MTB is around 44T for reference.

If you stil need lover gearing its worth considering to modify your cassette with a one up.
 
I gear mine only for top speed commuting. 52t on a 26er, 48t on a 29er. IIRC, 28-30 rpm achieved at around 85rpm cadence on a 11t cog. You can calculate this on Sheldon Browns gear calculator. The BBS02 gets you to around 28 mph (flat no wind) in highest level pedelec mode with a 13S 48v battery.
 
tomjasz said:
Stay away from the 52T. I prefer the 44T. Lot's of grades to climb? If so consider even smaller.
Click to expand...

Is this the size of the wheel wich the chain is going around? (Sorry if this is a stupid question)
 
kje said:
tomjasz said:
Stay away from the 52T. I prefer the 44T. Lot's of grades to climb? If so consider even smaller.
Click to expand...

Is this the size of the wheel wich the chain is going around? (Sorry if this is a stupid question)
Click to expand...
Yes the sprocket size on the crankset.
 
Ok so I Can choose whatever I want and everyting Will fit my bike?

What LCD display do you recommend? I can choose C961/C963/C965

http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2014-3C-S316.027VD
 
I've now had some experience with all three display units.

The C963 is nice because the control buttons are integrated with the display unit. But it only shows speed and distance in Kilometer units so not so great if you want to see mile units.

Both the C961 and C965 have control buttons separated a bit from the display unit. The C961 mounts horizontal and the C965 mounts vertical. I find the odometer and distance display harder to read on my C961, but that may be partially because of where I installed it on my tadpole trike. The actual speedometer is easy to read on all models.
 
I've tried them all and went back to the 961. The added features of the others are essentially useless to me. CA2 or CA3 adaptability would be a real improvement. But I guess Bafang is tied to one manufacturer. If I ever get smart enough I'd like to follow Kepler's lead and use a CA. Until then I'm staying with my three 961's. But, I don't find any advantage on a separated switch.
 
Ok. Thank you. ☺ I'm then going for the 961.

Do I have to measure something on my bike before I order the Bafang motor? (The Chain?)
 
I ordered a 48V 750W BBS02 Bafang Central Motor at www.elifebike.com today. But there was no place to fill in my address. And I didn't get a receipt. Is this shop reliable?
 
kje said:
I ordered a 48V 750W BBS02 Bafang Central Motor at http://www.elifebike.com today. But there was no place to fill in my address. And I didn't get a receipt. Is this shop reliable?
Click to expand...

They shipped a BBS02 to my paypal address. I got it in 6 days to California.
 
kje said:
I ordered a 48V 750W BBS02 Bafang Central Motor at http://www.elifebike.com today. But there was no place to fill in my address. And I didn't get a receipt. Is this shop reliable?
Click to expand...
Looking forward to reading about your build!
 
tomjasz said:
Stay away from the 52T. I prefer the 44T. Lot's of grades to climb? If so consider even smaller.
Click to expand...

The shop http://www.elifebike.com/ told me that the 44T is out of stock. Would 48T be a bad choice?
 
Is there other shop alternatives than elifebike?
Another Internet site to order Bafang crank motor? ☺
 
kje said:
Is there other shop alternatives than elifebike?
Another Internet site to order Bafang crank motor? ☺
Click to expand...

I got mine from eMax in Australia, but the shipping might hurt you. That said, the AUD is tanking at the moment, so the exchange rate might be in your favour.

http://www.emax-ebikes.com.au/store/p23/BAFANG_BBS02_Kit.html
 
I had a BBSO2 for about a year (& 1200 miles) of trouble free enjoyment. It was on a Trek Excaliber 4 29" HT Mtn bike. I took it a step further and installed a Nuvinci CVT rear hub and really enjoyed it. I had the 52 tooth chain ring and had no trouble with normal hills on my commute. I rode in pedal assist all of the time and never had any malfunctions. I have hills on my commute that would allow maybe 2-3 mph without any motor assist that I climbed easily at 8-9 mph with the Bafang. My top comfortable cruising speed on flat ground was around 20 mph. I bought the entire system (other than the bike) from EM3EV including a 14s9p (18650) battery.
I sold it recently (at a substantial discount from what I had in it) in order to build a rear hub motor driven bike. I used EM3EV again for the electronics, battery (21s14p 75v) and their new ebike frame. Am waiting on some parts in order to complete the project and with being without the Bafang bike for a couple of months, really miss it. Great system. Good Luck.
 
Can I go wrong with a 46T front chainring?
Click to expand...

Unless you are on the edge of something, performance wise, I don't think it matters too much which chainring you install.

The bike I put together for my sister has a 46T coupled with a Nexus 8 that has about a 20T (don't remember for sure). She climbs 20% grades with no trouble.

My tadpole trike has a 48T coupled with a 9 speed derailleur (don't know what the tooth counts are). This trike will also climb up to 20% grades.

My guest delta trike has a 44T coupled with a 7 speed derailleur (again I don't know what the tooth counts are). Runs good, but hasn't been tested on any steep hills yet.

All three of these bikes/trikes have a 500W 48V Bafang mid-drive and a 10AH LiFeP04 battery.

Good luck with your build. Let us know how it comes out and how you like it.
 
I got a battery shipped from elifebike.com in 3 business days last summer, so I was impressed with the delivery service. It went to my paypal address.

You might check lunacycle.com to see if they have the BBSO2 in stock and their price. They say that their version is programmed for more power, and will have the production changes that uses better transistors in the controller.
 
Lunacycle has the BBS02 in stock at a fair price, $536. He ships from the US and supports you after sale. He knows the product, and his come with latest upgrades to the FETs and firmware.
http://lunacycle.com/motors/bafang-...750w-mid-drive-with-upgraded-3077-controller/

But be careful on his site, you might be tempted to buy the HD version for $800.
http://lunacycle.com/motors/bafang-mid-drive-and-parts/bafang-bbshd-1000w-mid-drive-kit/

Or even buy your battery from him.
http://lunacycle.com/batteries/packs/
 
I'm building the bike now. Should I use my old brakes? Or use the brakes that is in the package?
 
The brakes shipped are wired the unit to shut down the motor when you brake. USE THEM. Or buy new parts to use your existing brake levers. Some have complained about the included levers, but I'm happy with mine. OR as I wrote you'll need to use something like a HWBS Sensor.


"The HWBS Sensor allows any mechanical brake (with cable, not suitable for hydraulic brake) to be used as an ebrake. No need to swap brake levers, keep your existing levers. Sold as a single unit, not a pair."

http://em3ev.com/store/index.php?route=product/product&path=41_57&product_id=176
 
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