Chain dropped on Sunday. I have a granfondo this weekend so no way I can fix this on time. Not sure what to do. My cycling group told me its mostly cosmetic and that area is very thick, but I really don't know what to do.
I am not a carbon expert, like everyone else who’s replied so far.
It does appear like the damage got through the paint and clearcoat, and that you compromised maybe a layer or two of carbon. The strength of carbon fiber does rely on having all the layers intact.
That said, it’s in a pretty beefy area. I have a feeling that you’re very likely to be fine for the weekend ride. Afterwards I would consult a CF repairer promptly if it were my bike.
Iluvgr8tdeals on
Carbon is surprisingly sturdy and the damage looks cosmetic and your group ride friends are probably right in that the damage has occurred in the ‘meaty’ areas of the frame and therefore not as damaging to the frame integrity if at all.
You’ll get through the grand fondo race. If it was a bone-shaking mountain bike XC race then I would second guess myself. Once the race is over, have it checked out by a professional carbon repair person.
minster7 on
Tell your wife /husband that the damage is catastrophic and requires you to get a new bike
Deep-Television-9756 on
Everyone who’s owned a carbon fiber bike has done this. You can install a chain catcher/guide next time. Tis’ but a flesh wound
waitareyou4real on

control__group on
If i threw away every carbon bike that got a dent like this from a chain drop i would have thrown away dozens. How many have i thrown away. None because this is nothing and not worth worrying about. You chipped the paint. Its fine. Keep riding.
If it creaks or cracks in the future, then worry about it, but for now its fine.
Foolgazi on
It’s a little worse than cosmetic, but personally I’d still ride it in a grandfondo. I’d then bring it to a qualified shop for an evaluation when I got home.
TerranOrDie on
Quarter test.
dobie_gillis1 on
Most of my bikes have chain catchers to avoid this situation, and the general hassle of dropping a chain:
11 Comments
Just ride it dude it’s cosmetic
Change the chain for sure.
I am not a carbon expert, like everyone else who’s replied so far.
It does appear like the damage got through the paint and clearcoat, and that you compromised maybe a layer or two of carbon. The strength of carbon fiber does rely on having all the layers intact.
That said, it’s in a pretty beefy area. I have a feeling that you’re very likely to be fine for the weekend ride. Afterwards I would consult a CF repairer promptly if it were my bike.
Carbon is surprisingly sturdy and the damage looks cosmetic and your group ride friends are probably right in that the damage has occurred in the ‘meaty’ areas of the frame and therefore not as damaging to the frame integrity if at all.
You’ll get through the grand fondo race. If it was a bone-shaking mountain bike XC race then I would second guess myself. Once the race is over, have it checked out by a professional carbon repair person.
Tell your wife /husband that the damage is catastrophic and requires you to get a new bike
Everyone who’s owned a carbon fiber bike has done this. You can install a chain catcher/guide next time. Tis’ but a flesh wound

If i threw away every carbon bike that got a dent like this from a chain drop i would have thrown away dozens. How many have i thrown away. None because this is nothing and not worth worrying about. You chipped the paint. Its fine. Keep riding.
If it creaks or cracks in the future, then worry about it, but for now its fine.
It’s a little worse than cosmetic, but personally I’d still ride it in a grandfondo. I’d then bring it to a qualified shop for an evaluation when I got home.
Quarter test.
Most of my bikes have chain catchers to avoid this situation, and the general hassle of dropping a chain:
https://www.biketiresdirect.com/product/k-edge-pro-road-braze-on-chain-catcher?v=k000000&adl=1&gad_source=1&gad_campaignid=636125664&gbraid=0AAAAAD_gqPk_QDFzb1anEOcRpQptDSa7N&gclid=CjwKCAjwmenCBhA4EiwAtVjzmiBwpW96VYmLaaII7syHOlVjvBv9XJ1PGyR1Xij8aHBfh_GJOwWolRoCuEEQAvD_BwE