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.
5 Likes
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
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.
1 Like
I can see if a given athlete has this chainring on a time trial dedicated bike, it’s probably never an issue.
1 Like
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 
1 Like
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
1 Like
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
1 Like
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.
4 Likes
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…
1 Like
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
1 Like
Perfect. Keep us updated! 
I’m on the fence of ordering a 52/36 ultegra myself, but I prefer to be sure it’s stiff enough before I’m doing max effort sprints 
They do feel stiffer and the front shifting is better than before, but I think the aliexpress stone chainrings shift better than the alugear ones
When I sprint my max power peaks just above 1400W, so I’m a just little concerned that it may not be stiff enough. Maybe I should just give it a shot and hope for the best.
I really, really like how these chainrings look.
Sadly I’m just finding this thread now. I’m on Ultegra di2 12 speed. I got my Alugear 54-40 in April 2024. Chain slipped in a 35 mph crit sprint at the end of May. Didn’t crash, but whacked my knee pretty good on the top tube. The chain slipped right at the beginning of the power stroke before you really get up to high rpm. Lucky not to go down. I put it off to improper front derailleur adjustment. I didn’t end up racing in anything that came to a sprint after that last year, but it happened last weekend in the first race of the 2025. Same exact situation. Took it to my local Shimano expert and he made some fine adjustments. I tested it out yesterday in training with the same results. I was able to make it happen while in the saddle, so much safer. I’ll be switching to Dura Ace and looking for a refund from Alugear.
Have you got the updated chainrings? If it is still happening with the new design they need to do a full recall.
I’m not sure if mine are updated since I don’t have anything to compare them to. The ones I have look like the image further up in this thread that are apparently the redesign. Some additional searching found a few other threads on different forums describing the same issue–sadly with some hospital trips. I don’t know how recalls work for companies outside of the US. Sounds like it would certainly be the right thing to do. I emailed them to request a refund.
1 Like