I thought about this, it just sounds like too much investment at this point. It is a bummer, honesly JB weld sounds nice (I kid).
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Are you sure the chain rings wouldnāt be compatible with a new crankset? I thought the differences were just cosmetic I.e. A previous generation ultegra chain ring would still fit a new ultegra crankset just might not look quite as slick.
The issue has to do with the chain line. I forget the numbers, but they differ around 1mm or so, but that is not something I know for a precise value without more research. No matter the actual number, Shimano is using the 12-speed based cranks for the 11-speed solution requires āspecialā chainrings from Shimano to offer the replacements.
I have not heard anyone question the future issue of possible chainring replacement since what they are making for this fix is not like either 11-s or 12-s options that will be readily available for future needs. And then this example shows the future case of issues for anyone heading to non-Shimano rings for any reason. In a way, Shimano just created a 3rd chainring standardā¦ and we know bike riders love new āstandardsā 
ETA: Quick specs comparison between stock 11-s & 12-s Ultegra
This is still up to debate to me, I thought the 4-bolt spider pattern changed slightly. Regardless, my chainrings probably wouldnt work as they are cut to fit the 9100 cranks
Isnāt 1mm of chainline difference just a minor tweak to the FD? āSpecialā chainrings sounds like a terrible idea!
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As I tried to make clear above, I am not locked into that specific value. The info I posted above was just one possible resource for comparison and may not tell the whole story.
I saw it mentioned in my passes through the STEC videos, and I think mentioned in one of the public articles. Whatever the actual delta, Shimano seems to think a unique solution is necessary.
Dura Ace 9200 chain ring above. Looks like there are now 2 junctions (the bottom 2) where it curves away from the centre instead of 1. So I would guess that a 12 speed chainring will fit on an 11 speed crankset but that the 2nd curved junction wonāt match up nicely. And an 11 speed chainring wouldnāt fit on a 12 speed crankset unless you carved an extra piece off one of the junctions to make it fit.
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The bike industry really needs to understand the difference between āstandardsā and āspecificationsā
/rant
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Somebody might use this as escape card:
I bought a bike todayā¦ and havenāt told my spouse
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So bike shop got in touch to say theyād received new guidance - customers no longer doing visual inspection first, and no need to remove cranks - which Iām guessing many wouldnāt know how to do let alone reinstall them - and they can now do inspections.
Took my bike in and my cranks were fine but they still submitted photos to Shimano for some reason. Glad I wonāt be without a power meter for who-knows-how-long, and can return the unused & unopened R8000 chainset I ordered from Ribble.
Took about 45 mins from dropping bike off to getting phone call saying it was all good, if Iād known it would be that quick Iād have just gone next door for a coffee and waited! At least itās within walking distance for me, unlike some people who are 100s of KM from a suitable shop.
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On a serious note, I think many of the points raised in the suit are legitimateā¦and including Trek and Specialized could be a viable argument as the issue, however minor, has been known for years yet those companies continued to spec the cranks.
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LOL, I was wondering about that too 
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Just overheard at the Stages Marketing Team meeting - āpull all our advertising from BRā¦NOW!!!ā
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Just for grins I clicked on the link to the lawsuit filing and the first plaintiff bought their bike from my LBS 
.
Iāve yet to take my bike in for official inspection. I plan on pulling my cranks and removing the chainrings to take a close look myself before taking them in. The bike could use a good cleanup anyways.
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A buddy has a ~4 year old Canyon AeroRoad, took it in for service and once they looked there was obvious cracks/delamination.
Where did you find those specs?
Iād be switching from an older ultregra 6800 - is that just the same as a R8000?
EDIT:
Found itā¦ looks like the chainline on the 6800 is also 43.5 and the Q-factor is slightly larger at 146.6
The sad thing about the class action lawsuit is that the only people really going to make money are the lawyers. The consumers, who were actually affected, arenāt likely to gain much.
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I am sure this is a legal tactic, but I find adding the bike manufacturers a stretch. Unless they had some insider info that we all didnāt have. A great number of consumers (at least deep nerds like us) were aware that these cranks had shown some problems. There is #thanksshimano and several forums like this with threads discussing the issue years before this recall. And yet, we bought the bikes with the cranks and hoped for the best.
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