Bafang BBS-HD chainring adapters?

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Leebolectric   1 kW

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Re: Bafang BBS-HD chainring adapters?

Post by Leebolectric » Jan 16 2016 11:19pm

I think a series of different offsets would be better to help the most people.

And with those offset options...we need NEW nomenclature.
Normal drivetrains base their chainline number off the center of the bike. (i.e..52mm chainline is 52mm from the center of the bike.)
With the Bafang kits, that are designed and used on so many BB widths and spacings...we need different terminology.
I suggest calling the Bafang's stock chainring "ZERO"...and when it is first installed you will see which way and how much would be better to move it.

Following that theory^
Aftermarket chainrings could be labeled as Chainline: "Zero", "+1mm", "+2mm", "-1mm", "-2mm", etc...
This would help a lot of people with their upgrade plans.
2015 Intense Tracer275 with Tangent Ascent inside triangle https://endless-sphere.com/forums/viewt ... 28&t=75045
2010 Turner 5Spot with BaffangHD https://endless-sphere.com/forums/viewt ... 28&t=75569
2009 KHS Velvet 6" with BafangHD (see above thread^)
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Re: Bafang BBS-HD chainring adapters?

Post by Dogboy1200 » Jan 17 2016 9:31am

I agree completely. My BBSHD application is a 68mm BB and the stock chain wheel gives a great chain line with a straight chain in 5th of 9 gears. I got the Eclipse and it has an extreme offset. Won't work on my bike. I haven't sent it back yet so I will measure the offset of both and post them here later today. Word on the street is the new Lekkie bling ring is somewhere between these 2 with regard to offset.
2007 Transition Preston FR BBS02 https://endless-sphere.com/forums/viewt ... 28&t=73635 Now HD https://endless-sphere.com/forums/viewt ... &start=225
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Leebolectric   1 kW

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Re: Bafang BBS-HD chainring adapters?

Post by Leebolectric » Jan 17 2016 10:13am

maybe it's a good idea for people with 68mmBB to buy the 73mmBB model...and add a BB spacer...
This could give better chainline and make the aftermarket rings more useful. ;)
EDITED
(scratch that, the motor needs contact with the BB...so a spacer would make the mounting less sturdy)
Last edited by Leebolectric on Jan 17 2016 10:27am, edited 1 time in total.
2015 Intense Tracer275 with Tangent Ascent inside triangle https://endless-sphere.com/forums/viewt ... 28&t=75045
2010 Turner 5Spot with BaffangHD https://endless-sphere.com/forums/viewt ... 28&t=75569
2009 KHS Velvet 6" with BafangHD (see above thread^)
2015 SantaCruz Bantam with TEMPORARY Cyclone https://endless-sphere.com/forums/viewt ... 28&t=76131

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waynebergman   10 kW

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Re: Bafang BBS-HD chainring adapters?

Post by waynebergman » Jan 17 2016 10:23am

"Lebolectric", my thread here https://endless-sphere.com/forums/viewt ... 6&start=25 shows some chain line photos that may help for the luna 42 tooth ring. I set mine up for perfect chain line in first gear as this is where I live for most of the time on this bike. I respaced my cogs and took some out so I only have a 4 speed which I like. 4 th gear gets me close to 27mph and first gear about 15mph or so. Works super good.
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sather   100 W

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Re: Bafang BBS-HD chainring adapters?

Post by sather » Jan 17 2016 8:34pm

The Luna moves the chainline closer to the bike's center line than the stock 46.. I have no idea about the new Lekkie.

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Re: Bafang BBS-HD chainring adapters?

Post by Samd » Jan 17 2016 9:18pm

There's no such thing as a perfect chainline for all bikes. A handful of bottom bracket widths and several rear dropout widths etc make for a lot of combos.

Having the ability to adjust is useful.
http://ballaratebikes.com/

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Jan 17 2016 11:08pm

Samd wrote:There's no such thing as a perfect chainline for all bikes. A handful of bottom bracket widths and several rear dropout widths etc make for a lot of combos.

Having the ability to adjust is useful.
BBSseries Building 101. Thanks Sam!
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Re: Bafang BBS-HD chainring adapters?

Post by sather » Jan 18 2016 9:42am

The dropout width, rear axle offset (Surly), tire width, bottom bracket width, and the width of chainstays at bottom bracket all vary. Always buy a wider BBSHD than necessary. Then adjust with bottom bracket motor spacers, chainring spacers, and off-set crank arms. Grinding on bottom bracket is extreme.
Great article:
http://electric-fatbike.com/2015/11/19/ ... hainstays/

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Re: Bafang BBS-HD chainring adapters?

Post by liv2ryde » Jan 19 2016 4:32pm

Still waiting on my Red Eclipse 42t...I ride mostly single track so when I seen this 30t Luna Eclipse I knew it would make my bike so much safer and usable in the tight up hill's! Seems to fit my Framed perfectly.Image
*Framed Minnesota 2.0 Fat Bike w/ Luna Cycle BBSHD 52v 1000w mid-drive, red LUNA 42T bling ring, Surly Bud/Nate, Scram X5 9 speed
*Marin Mount Vision 7 full suspension mountain bike w/ BBS02 48v 500w mid-drive, black Lekkie 42T bling ring, XT 10 speed
*Sonders eBike fat bike 36v 350w rear direct drive hub

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Jan 19 2016 5:43pm

liv2ryde wrote:Still waiting on my Red Eclipse 42t...I ride mostly single track so when I seen this 30t Luna Eclipse I knew it would make my bike so much safer and usable in the tight up hill's! Seems to fit my Framed perfectly.\
NICE!!!!
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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motomoto   1 kW

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Re: Bafang BBS-HD chainring adapters?

Post by motomoto » Jan 20 2016 12:17am

liv2ryde It's not Eric's fault about your red ring not showing up. I just sent them to him. He will get them Thursday.

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Re: Bafang BBS-HD chainring adapters?

Post by liv2ryde » Jan 20 2016 5:19am

motomoto wrote:liv2ryde It's not Eric's fault about your red ring not showing up. I just sent them to him. He will get them Thursday.
That's ok, I will be busy using this 30t. So glad to lose the stock bafang 46T anchor :-)
*Framed Minnesota 2.0 Fat Bike w/ Luna Cycle BBSHD 52v 1000w mid-drive, red LUNA 42T bling ring, Surly Bud/Nate, Scram X5 9 speed
*Marin Mount Vision 7 full suspension mountain bike w/ BBS02 48v 500w mid-drive, black Lekkie 42T bling ring, XT 10 speed
*Sonders eBike fat bike 36v 350w rear direct drive hub

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Green Machine   100 kW

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Re: Bafang BBS-HD chainring adapters?

Post by Green Machine » Jan 21 2016 9:26pm

Red is on the way sent out tonight...but first we could not resist for a photo op in our shop with all the new red and blue and black..... before they all sent out...

We assembled them and only had them for a few hours.....

Made in the USA...Sold in the USA..... and for 95 bucks they are one of the best bargains we sale. 1.5 hours of cnc time for each one here in USA. I literally losing money on these.

We are very proud of our chain ring.
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Re: Bafang BBS-HD chainring adapters?

Post by Green Machine » Jan 21 2016 9:28pm

One more pic with a brand new clutch to a 750hp v10 lamborghini motor.....

Lightweight, powreful, looks awesome ....and the chain does not fall off even under high power. :)
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Re: Bafang BBS-HD chainring adapters?

Post by sather » Jan 23 2016 8:36am

There still a need for a BBSHD 36 tooth chainring, which would give a one to one ratio with a 36 tooth cassette. I have a Luna 30 and Luna 42. The 30 tooth Luna is so powerful and fast spinning that the bike ceases to be a bike (you can't peddle along). The 42 tooth Luna needs a 42 tooth Wolftooth cog in order to climb steep trails.

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Re: Bafang BBS-HD chainring adapters?

Post by waynebergman » Jan 23 2016 10:19am

Sather I think you are right about this but if you can get a compatible deraileur to work with the 42 tooth on the rear the combination of the 42 up front and the 42 on the back may be the best combo because with the bigger sprockets the chain and the sprokets should last longer. Its just the initial cost and hastle of getting the 42 to work on the cassette.
Also if a 36 gets made you still have a funny chain line to the first gear at least with my frame. What I did was hack things to make the cassette work as a 4 speed with perfect chain line to first gear and all is well. I may tweek things still a bit and make my perfect line to second gear as when I run it in 4th right now there is a tiny bit of chain noise coming from the chain rubbing slightly on my 28 tooth (3rd gear). I figure if I run a perfect line to second gear which is the 36 tooth my first gear the 42tooth will be only slightly out of line and my fourth gear the 20 tooth will run a bit straighter so it does not rub on the third cog. Running 7 or 8 gears is dumb in my opinion. It only takes a coulple of hours to make this work as a four speed and it works well. My rear cog numbers are 42,36,28 & 20 Every gear in that cog set that you really dont need is just hogging up the few usable spaces you have for a decent chain line. And I figure there is only really 4 spaces that run clean and sound good and that is about it.
I have ridden my bike now every day for the last few weeks in this configuration and it feels right I think with my last tweek nudging the cassette inbound about an 1/8" I will be there. Time however will tell.

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Re: Bafang BBS-HD chainring adapters?

Post by sather » Jan 28 2016 2:26pm

The 130BCD chainring adapters for the BBSHD are now available from Lectric Cycles. This will allow use of a 40 tooth, 42 tooth and 44 tooth Raceface narrow wide chain rings. Also, the AbsoluteBlack 38tooth narrow wide chain ring (very expensive at $73)

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Re: Bafang BBS-HD chainring adapters?

Post by Stu Summer » Jun 19 2016 2:41pm

Bruno (YouTube) wrote:[quote="sather"
]I don't know why you would want larger chainring than the stock 46 tooth on a road bike. This video shows Bruno's BBSHD 46 tooth on Trek street bike going 74 km/h (45mph) on the street.
https://www.youtube.com/watch?v=RbiNoNmqUpg
Yes... 46T feels great, I would only get bigger for some insane top speed tests and then put the 46T back. Bigger chainring stresses the internal gears causing premature mechanical problems. The BBSHD spins much faster so even smaller chainrings you get a good top speed
=]
I want a larger chainring than the stock 46T so I can still pedal at 30-40mph. Would putting a 52 T chainring on damage the bbshd by slowing down its rotations?
2013 DB Haanjo Commuter with BBSHD and Zzipper fairing
Marin Rift Zone FS with BBSHD
Kysmo "lab" bike with 350w hub motor
Ryan Vanguard recumbent LWB with a 36v Cyclone 350w middrive and a 56v MAC 5t in the front hub.

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Jun 20 2016 12:05am

It won't slow down the rotations, see electricbike.com for alternative chainwheels. The Luna 42 can be used for a 52t chainwheel. All dependent on whether you end up with a workable chainline.

Just order a 130mm bcd chainwheel, mount and go. But the best chainline will be with the Lekkie bling or Luna Eclipse on most bike. 42Tx 11T with a 52v battery ought to deliver in the low 30's. Beyond the braking capacity of most conversions.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Jun 25 2016 1:40pm

Here's the available, minus the OEM
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Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Re: Bafang BBS-HD chainring adapters?

Post by Stu Summer » Jul 01 2016 6:35am

How does the stock OEM 42t chainring compare to these? Where does it fit in the lineup?
2013 DB Haanjo Commuter with BBSHD and Zzipper fairing
Marin Rift Zone FS with BBSHD
Kysmo "lab" bike with 350w hub motor
Ryan Vanguard recumbent LWB with a 36v Cyclone 350w middrive and a 56v MAC 5t in the front hub.

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Jul 01 2016 9:20am

About like the lekkie. That unpopular OEM is a great design. Another example of a few commentators prattling on about how ugly and suddenly we have versions that aren't as likely to fit as well.

it's all here,

http://electricbike.com/forum/forum/kno ... s-compared
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Re: Bafang BBS-HD chainring adapters?

Post by hansomat » Aug 08 2016 4:51am

I put a standard 53T chainwheel on my HD using Luna's adapter. Performance was quite amazing with the advantage that I would not only use the smallest sprocket most of the time. However, after a day of serious testing, the chainring was bent and scrap metal.

For me, there is two questions now: Which 50/51 or 52T chainring, preferably steel, would take the load? And which one of those would give me the most inward offset to maintain the ability to use all sprockets. The OEM chainring is quite superb when it comes to the chainline on my bike.

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Re: Bafang BBS-HD chainring adapters?

Post by tomjasz » Aug 09 2016 12:11pm

hansomat wrote:I put a standard 53T chainwheel on my HD using Luna's adapter. Performance was quite amazing with the advantage that I would not only use the smallest sprocket most of the time. However, after a day of serious testing, the chainring was bent and scrap metal.

For me, there is two questions now: Which 50/51 or 52T chainring, preferably steel, would take the load? And which one of those would give me the most inward offset to maintain the ability to use all sprockets. The OEM chainring is quite superb when it comes to the chainline on my bike.
There is no currently produced chainring in that size with the chainline of the OEM BBSHD. I have an adapter from Cali eBikes and a 52T that won'r bend but the chainline is like that of the Luna adapter.

It's for sale at cost with free shipping.

Luna keeps telling us we'll have a 52T but so far they are barely keeping up with Eclipse sales. The 42T Eclipse is the best chainline I've seen of any.
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Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Re: Bafang BBS-HD chainring adapters?

Post by hansomat » Aug 09 2016 2:13pm

Thanks for this tomjasz. I guess, we'll have to keep encourageing Luna to come forward with a 50T and/or 52T. With the chainline of the Eclipse.

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