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Looking for some Bafang mid drive input

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Looking for some Bafang mid drive input

Old 06-29-18, 09:22 AM
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Metal Man
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Looking for some Bafang mid drive input

Does anybody have any experience with the Bafang mid drive units? Any input would be appreciated. I'm looking at this for a Surly Big Dummy.
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Old 06-29-18, 09:50 AM
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I've installed three BBS02's, two on hardtails and one on a rigid bike, all used almost exclusively offroad by my wife and me. Installation is easy as long as you have the tools to remove a bottom bracket (obviously not needed if starting with a bare frame). They systems use 52V batteries, and we rarely need level higher than 1 (of 5). The only thing that bothered me about the units is the right crankarm is about 15mm farther away from the chainstay than the left since I'm OCD about symmetry. This is easily "straightened" out with Lekkie crank arms. There have been no problems with them, and the oldest one is going on three years of pretty hard use. Anything specific, just ask either in the thread or privately. Procured two of the BBS's and two 52V batteries from Luna Cycle and they have been excellent vendors.
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Old 06-29-18, 02:27 PM
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Couple of other things: the motor weighs about 10 pounds, so with my 52V, 6 ah battery (3.5 pounds) adds 12 - 13 pounds to the bike since the 1.5 pound crankset is replaced. Also, I prefer 68mm bottom brackets since they allow enough room for a "jam" nut. Some individuals have had success with 73mm frames using Locktite to secure the nut, but it didn't work well for me.
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Old 06-29-18, 05:37 PM
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Thanks, I think my BB is 68mm so I should be good there. I'm looking at the BBS HD1000, I sent a question to Dillenger trying to figure out if that will work with my current batteries. Mine charge to about 42V and run about 38-39V.
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Old 06-29-18, 06:17 PM
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The BBSHD doesn't have the same "problem" with BB width since AFAIK it can be ordered specifically for each size.
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Old 06-30-18, 09:53 AM
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I believe the BBSHD is only for 48V and above. My 750W BBS02 won't run on 41 V. It might power up on a freshly charged 36V battery, but as soon as I spin the motor, it flashes a low voltage error.

Ask Dillenger about using pedal assist and throttle. Older BBS units let the rider combine pedal and add throttle as needed. I've been reading that the newer models have changed so that you cannot use throttle and pedals at same time.You have to stop pedaling and then invoke throttle.

A lot of BBS riders probably don't care, being throttle only, but I wouldn't like that, Other than that, I really like my BBS02 kit. Quietest ebike I own, and most powerful. Adds weight, but I've gone 20 miles with a non-working battery.
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Old 06-30-18, 01:01 PM
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Doc, are you saying that you think you could then pedal after you are going with the throttle or is it that you can't pedal along with the throttle at all?
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Old 06-30-18, 02:15 PM
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I believe you can't pedal and use part throttle. It has to be twisted full on. I dunno. My older bike from early 2016, and obvious 2old's bikes, they work properly.

I'll point you to these guys. Long thread.
https://endless-sphere.com/forums/vi...p?f=28&t=91306
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Old 06-30-18, 09:53 PM
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I couldn't tell you about the throttle never hooked it up I'm like 2old use it on one and two except steep hills.I like using my bbs02 low on power and happy I didn't get the BBSHD because there is a weight difference 42 pounds total weight like to be lighter.One thing I like about it is I can push myself harder and know I wont have to push my bike up the 15% slope to get home.It has the 52v 13.5 amp battery and really goes a long way on low.
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