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BBSHD Aluminum Chainring Adapter and 42T Sprocket

$69.95 $49.95
(You save $20.00)
Calculated at checkout

Product Description

  • Aluminum chainring adapter with 42 sprocket for the BBSHD
  • 130mm bcd
  • 220 grams is less than half the weight of the steel bafang sprocket
  • 2 pieces so you can use with other sizes of chainrings
  • Designed by Luna
  • Lightweight 
  • Wicked tooth profile to hold your chain on
  • Anodized black
  • The first ultra affordable chainring set for the BBSHD


The only negative complaint we have heard about the BBSHD is the ugly and heavy steel chainring.   

Luna is excited to offer its new custom aluminum chain ring adapter and sprocket set  that looks twice as good and weighs half as much as the stock ring. In additon this sprocket uses the latest in sprocket tooth technology to hold on your chain better, and offers a more ideal gearing for the BBSHD with its 42 teeth. 

This is not the piece of art that the $100 Luna Eclipse chainring is but serves the same purpose and saves a bunch of dollars. 

This chainring looks as good as any other chainrings (besides the Eclipse) on the market at a reduced price.

It uses extra thick teeth to grab your chain and for long lasting durability. 

The chainring is in two pieces so you will eventually be able to put other sized sprockets such as the 5 bolt race face chain rings. 

We are offering this set up at a very reasonable price at $59. Compare that to our competitors who sell similar set ups for well over $100.

Note: This does not have as much offset as the more expensive chainrings. If you foresee having chainline issues you want our Eclipse or Lekkie.




What is the weight of each Luna chainring?

40T = 316g 42T = 228g and 44T = 248g

Product Reviews

Write Review

  1. Disappointed

    Posted by Teigan Johnston on Mar 2nd 2017

    First day using it and a tooth bent. I attempted to bend it back but no luck. Had a fun walk home....

  2. Didn't Work For Me

    Posted by Jeff Markham on Feb 23rd 2017

    This sproket is far better than the one provided by Bafang (aka. the Death Frisbee). I'm disappointed though, due to a lack of offset. It's on my bike now and seems to be working fine, but the chain line is way off, in favor of the smallest gear on the rear cassette. As a result, when I use my largest rear gear to climb hills the chain is highly bent. I'm not sure what type of bike this sprocket would produce a good chain line on. At some point I'm going to have to upgrade to the Eclipse in order to get a proper offset and avoid destroying my chain.

  3. Not enough offset for my particular bike

    Posted by Michael on Feb 6th 2017

    The chain isn't as tight but my chain line is worse than the stock 46. Going to have to rethink
    longevity of the drive train because I will end up going through parts. Solid build and would work
    for a thinner bottom bracket is my thought.

  4. Great Quality AND Very Lightweight

    Posted by Lee Placchi on Jan 6th 2017

    This is an AWESOME ring to replace the stock BBSHD steel unit. The weight difference is huge and the teeth are so impressive alternative at a fair price. Watch the video that Luna provides on chainring depth to be sure your chain lines up well (very thoughtful of the Luna people to provide so much detailed info). Great product from a great group!

  5. Good Chainring

    Posted by randy on Dec 22nd 2016

    Works well just wish it was a little more inset for a better chain line.

  6. Great chainring.. Lacked offset for my bike

    Posted by Bill K on Sep 18th 2016

    Great light chainring nice alternating tooth pattern!
    Unfortunately I had to put the steel chainwheel back on as it has a greater offset and aligns with the big gears on the back better.. Less tooth grinding!
    Looking back I would have ordered a Lekkie or chain wheel with more offset

  7. A Problem Solution

    Posted by mardoudan on Sep 16th 2016

    I bought my 1st 68mm BBSHD for my 22 year old Bridgestone MB-4 mountainbike conversion. I powered it with the Luna 48 Volt Shark 14ah GA Pack. After installing the BBSHD, I mounted the Shark pack on the downtube water bottle mount screws. Unfortunatly the Shark pack was rubbing on the chain. I needed some clearance, so I ordered this Luna Chainring. It worked perfectly, providing me a comfortable clearance from the Shark pack. I do feel a bit more torque on take off as well. I've been getting 45 miles range on an 80% charge. PAS varies from 1 - 9.

  8. Luna 42 Tooth Low Cost Chainring for the BBSHD

    Posted by Kent on Aug 19th 2016

    Works on my Ellsworth Epiphany SST2 full suspension, but for perfection in terms of offset, I switched to the Luna Eclipse 42T chainring + optional spacer. I can still use this chainring as a backup or with my other frames, perhaps.

  9. Bafang 1000w mid drive 42 tooth sprocket

    Posted by David P on Aug 19th 2016

    I put this on my mountain bike. .... like the idea I can use standard 130mm 5 bolt chainrings. .... easy to find and are less expensive! :) I use my bike mostly on the streets and paved trails so I found that the 42t was a little too low so I went with a 44t ..... can cruise easy at 18mph on level 1 (1-3) with the 1000w Bafang. .... I love the combination! :)

  10. Bafang 1000w mid drive 42 tooth sprocket

    Posted by David P on Aug 12th 2016

    I bought 2 of these...... one for my 4 wheel pedal car and one for my mountain bike. Both of them installed and worked just fine...... one compromise was chain alignment tends to be a little to the outside on the mountain bike because of the motor design..... gear housing clearance....... for the 130mm mount.
    I have an 8 speed cassette and decided to only use only 5 high speeds of the cassette and the chain ring was still not quite centered..... The biggest advantage is that you can use standard 130mm 5 bolt chainrings.... I ended up using a 44t that works well on my mountain bike and used the stock 42t on the pedal car. I am happy with both set ups and would recommend this product. Works, good price and I can use a standard chainring when it needs to be replaced! $20 for a new ring! :)

  11. Makes my bike Jump!

    Posted by Jim on Jun 30th 2016

    Great addition to my Lurch Fat Bike. Had been using the stock ring for 6 months. Didn't know what I was missing. The reduction in teeth (by 4) really made a difference in torque! The teeth are much more conducive to holding onto the chain as well. I used to have my chain come off occasionally with the stock ring. Not a pretty thing as it jammed in between the cog and wheel! I mean jammed! I also pre-ordered the 30 tooth mighty mini...

  12. matches description of the ring

    Posted by nicklas simberg on Jun 29th 2016

    work as stated in description, happy to finally remove the stock one.

  13. What's to say? It works

    Posted by cliff oliver on Jun 21st 2016

    From reading other reviews I understand the steel chain ring that comes with the BBXXX don't align very well with the rear sprocket and the size is not optimum. This lightweight chainring seems to work fine. Granted I only have 120 miles on it but it works.


  14. 42T aluminum sprocket

    Posted by Keith McElhinney on Jun 20th 2016

    Lighter than the original and deeper teeth. Good quality product.

  15. Adds enormous flexibility to my commuter

    Posted by Bernard Hardgrave on Jun 4th 2016

    I bought this chainring specifically for the adapter plate and I am very pleased to report that it allowed me to mount my Gates Carbon Drive 46 tooth sprocket to my BBSHD (this is the smallest Gates sprocket that will fit I found). Absolutely brilliant.
    It is also nice that the finish is a nice subdued black, not at all bling-y, and it is a well made, lightweight piece of kit.

  16. Excellent quality, bad chainline.

    Posted by Unknown on May 25th 2016

    I bought this adapter to install 53t chainring for my bike with 20" wheels, but, unfortunatelly, chainline doesnt let me to use larger cogs . But the adapter is very good made, I will use it after making second chainring with the right offset.

  17. nice sprocket

    Posted by Dale on May 11th 2016

    nice clean chain ring lighter and much better looking than the stock steel one, plus fewer teeth help with bottom end performance.