There are dozen after-market producers of chainrings but I haven’t found any who produces 2X for 12-speed (Shimano if that matter). Any ideas? Of course, I am looking for big rings like 56T or bigger.
I think Pyramid 2x chainrings may be compatible but with a YBN chain you might need to send them an email to confirm.
Are you looking to mount directly to Shimano cranks or replace the whole crankset? If using the Shimano cranks Rotor only has a 53t at the moment: https://rotoramerica.com/collections/road-chainrings/products/110x4-round-ring-sh9200-8100-compatible
Do you use the new 12 speed 9200/8100 crank, or an 11-speed crank?
I have been thinking about the same.
I have a shimano 12-speed system. Used a 1x with 56 and 58 pyramid chainring last year. Worked with shimano chain if i used KMC chain-link.
Now I use shimano original 54/40 Dura Ace chainrings. Works Great, but i miss the 56t front.
If you want to go for something other than Shimano i think Pyramid chainring 2x chainring will work (since their 1x ring work), but you will need to find a small ring that works. 42t is ok, but 44t Can be better for shifting. The problem is that i Can not find 42t or 44t inner rings for the Dura Ace 9200 crank. So you might have to do some dremel-work on a 9100 inner chainring to work.
Are you sure 11 speed chainrings don’t work? My understanding is that Shimano may not recommend it but they work fine
Are you sure 11 speed chainrings don’t work? My understanding is that Shimano may not recommend it but they work fine
I’ve been using 11-speed rings and 11-speed crank set the last year or so on Ultegra 12-speed and it seems to work fine. Probably requires a bit more fine-tuning and maybe not quite as nice front shifting (haven’t tried 12-speed chain ring and cranks, so can’t compare), but it’s really been fine.
Shimano 11s chainrings/cranks will work with 12s groupsets, but some chain drops are to be expected. See: https://www.cyclingnews.com/news/worldtour-mechanics-bemoan-shimano-chain-drops/
Aero 110x4 Round Rings - 2x | Rotor America
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Do you use the 54/40 chainrings on R9200 or R8100 cranks? Is there a difference?
someone/company could make easy money on this…
there is a HUGE market of people with 11spd that would want chainrings that work perfectly with 12spd…
We (AeroCoach) have done it, just waiting on the first large batch of rings to be finished before we officially release them. Getting the teeth right to work with both Shimano and SRAM (the 12spd chain roller dimensions are, frustratingly, a little different) was quite a bit of work! They’ll be released as Aten Dual chainrings, like our alu/carbon Aten 1x rings in terms of shape and construction.
Interesting!
One could then just change the rings of a sram axs crankset, or is it more involved (requiring a full crankset exchange, or even new front derailleur as the sram red option)?
Interesting!
One could then just change the rings of a sram axs crankset, or is it more involved (requiring a full crankset exchange, or even new front derailleur as the sram red option)?
First version is not 107bcd compatible (and I don’t think we’ll do direct mount ones yet), so for SRAM you’d need a crankset which can accept a 130bcd or 110bcd 4 bolt chainring. It’s another reason why I suspect people have held off from a 12spedd 2x project as there’s just so many permutations of bcds these days! I’d hope we can do 107bcd at some point, we have the shapes etc. it’s just demand because the batch sizes for machining chainrings need to be quite big.
You mean y’all are making 12s chainrings to fit shimano AND SRAM 12 speed? How is that possible?
You mean y’all are making 12s chainrings to fit shimano AND SRAM 12 speed? How is that possible?
I’m sorry I’m not sure I understand what you mean
Any plans for a non-gold Aten chainring? The gold does not go well with my bike looks 
New bike time! 
Other than for Track races, would Triathletes very often need a 55 -56th chain ring? I just was wondering what the market size might be because for our shorter crank size sales, the mid compact and compact sizes are much more popular. As Aerocoach has said, gearing up for a production run is pretty expensive and also lengthy. Shorter crank lengths are gaining in popularity so gearing options are becoming more in to question.
Other than for Track races, would Triathletes very often need a 55 -56th chain ring? I just was wondering what the market size might be because for our shorter crank size sales, the mid compact and compact sizes are much more popular. As Aerocoach has said, gearing up for a production run is pretty expensive and also lengthy. Shorter crank lengths are gaining in popularity so gearing options are becoming more in to question.
I can’t say what the market is in terms of what people actually buy, but customers aren’t always right. I have a 52/36 (due to delivery issues on the new DA crankset last year) and had a 10-33 Sram cassette on my disc wheel. During my last 70.3 which was rolling terrain and 750 height meters in totalt I was on the 10t cog a lot of the time spinning higher cadence than optimal. I am fairly strong riding 4,4w/kg for the 90k but still. Optimally from a drivetrain and cadence perspective I would have needed at least a 58t front and change to a 11-30 cassette. Most triathlon races are fairly flat and I think a lot would benefit from having bigger chain ring.
I have done Norseman 3-times with 1X setup of 50t front and 10-33 back. It is enough in terms of gearing but as the bike course is either up or down I spend most of the time in either the 33t or 10t cog which gives friction loss.
When it comes to production 3D-printing might solve it, or are we still not there yet?