Rotor’s products are of exceptional quality. My M9000 specific oval chain rings are better than Shimano’s XTR chain rings. Needless to say, you can’t bend them with your fingers.
I’d scamper over to their website and check if they have something suitable.
Yes I would class Rotor as a big company. They sponsor pro teams ROTOR Bike Athletes so at least have been sprinted on by people better than me!
Hello, we are running at full speed and it was planned maintenance with 1x we never had any issues.
Can you explain how the construction differs? Do you have features in the 1x chain rings that increase stiffness (like e. g. Rotor does)? Are there other differences between your 1x and 2x chain rings that make 1x chain rings stiffer?
Just want to update this. My alugear 54-40 chainrings were shipped on 3/18 (after the revision) and I have been dropping my chain on the outside of the outer chainring in the 54-11. Checked everything (front/rear derailleurs, chain length, chainline) with no success. So I believe the flex in the chainring hasn’t been resolved. I emailed Alugear and I’ll update when I hear back.
Is that under load?
Ive swapped to dura ace 54/40 with same chain and cassette and its been absolutely fine.
I have seen their 1x chainrings used in UK time trialling by someone fast and they’ve been fine but not seen their 2x rings yet used by anyone fast
I wonder if this is only an issue with the 2x chainrings. I put on my 1x chainring and did 3 crits so far and it’s been great. I tried to flex it and it’s more solid than the Stone chainrings I was running, and no noticeable flex like the video above. Maybe the 1x are thicker and therefore less prone to flex under load.
It might also be a function of how they are being used. In most of the racing I do, a sprint never comes into play and my max power on the day might be 700 watts. Obviously, I wouldn’t be flexing a chainring as much as someone sprinting in a crit or road race.
I can see if a given athlete has this chainring on a time trial dedicated bike, it’s probably never an issue.
As a data point for this, I had three sprints where I hit over 1,400W and didn’t notice any issues with the 1x chainring.
Have you got a derailleur there or retainer on your 1x set-up? I believe it’s the chainring flexing and pushing the chain into the derailleur which forces it off on my 2x set-up. No derailleur no issue is my thinking. I ain’t testing it again though 
No derailleur or guide. I think the narrow-wide teeth also help with retention.
Yes under load, but not even during a sprint. It always happens when trying to push a 54-11 down a descent. Not sure what’s going on but I’m not even putting that much power down when it happens
Never had an issue with any of their 1x stuff so seems like a 2x only issue
Update: I emailed Alugear and they offered to send me some updated chainrings which are releasing in the next couple of weeks. They even offered a full refund if those chainrings still have the issue. A+ customer service, hope the updated ones work
How did it go?
So far on the trainer it’s been okay in the 54-11. I just got it installed a few days ago. There is more material on the back side of the 54t chainring and the shift quality seems to be improved to compared to the last model. Alugear really provided great customer on their end. They sent me a new 54-40 and replaced the scratched up aero cover.
Looks promising.
Have you pushed any max effort sprints? It still holds up?
I was thinking it would be very useful to have this viewpoint, how the chain passes through the front cage, and would likely prove the ring is far too flexible. It’s too bad that plates couldn’t be added to each side (more likely prioritizing the inner side possibly) to add lateral strength there.
Stating the obvious, but it’s a very dynamic system that has some limitations, things like rings and bottom brackets flexing, yet the cage and chain are rather stiff laterally. There is so much on OEM chain rings there to avoid flex, so using something that doesn’t have that stability seems unwise/foolish, or just something that users should blindly accept, even expect. (Perhaps those that use those rings and don’t have the chain jump off just aren’t strong enough cyclists, or lucky?)
But one thing that I did was switch to the ‘RX’ rear derailleur. I was noticing grease marks on the chain stay, and put a Lizard Skin on it, but it developed a wear point in it, so I looked around for solutions, and found the Ultegra RX Di2, and no more marks, the chain seems to run through the system a lot better. Just an idea…
I’ve got my new rings as well and they do feel substantially stiffer in hand.
I have purchased dura ace chainrings in the same size though so I am fairly happy with my current equipment. Also injured my mcl so been off the bike for a few months so not had the inclination to test the new rings.
I will try to compare them shortly though as I’ve got 100 hours of annual leave to use by the end of August
