Broken derailleur led to torn-off rear carbon dropout (no hanger on p3), and I’m considering having a carbon repair shop fix it after LBS said frame was total loss.
Can anyone provide any support for my decision to repair versus replace assuming I won’t be using this bike for racing?
Broken derailleur led to torn-off rear carbon dropout (no hanger on p3), and I’m considering having a carbon repair shop fix it after LBS said frame was total loss.
Can anyone provide any support for my decision to repair versus replace assuming I won’t be using this bike for racing?
Has the shop mentioned the possibility of a crash replacement?
yes, the delta on repair versus replace is $1500.
If it’s repairable and repaired by a reputable carbon repair shop (e.g. Calfee, Predator and I’m sure a whole host of others) racing it will not be a concern.
Good luck. I could not find anyone that could do this repair. Several places said if I could find a broken P3 frame that had a good dropout, they could cut the chainstay/seatstay section of the broken bike and combine the two frames together. I just gave in and bought a replacement P3 frame from the shop.
Would this work?
http://problemsolversbike.com/...al_derailleur_hanger
Or maybe this, at the end of the thread:
Agreed - I don’t have a P3 but my frame also has an integrated hanger and when mine cracked the only option I could find was a new frame. They offered crash replacement but it was still a very expensive replacement. Would be interested to hear what the OP finds out.
Don’t know, I’m not much of a mechanic, maybe someone else can comment on their experience with these adapters…
But it does look like this would avoid the need to use the (now broken) derailleur hangar - this solution (if it is a solution) almost seems too good to be true!
Looking at it, it seems the RD mounts slightly further outboard, so you’ll probably lose access to your biggest sprocket on the cassette depending on how much inboard movement your RD gives you. Am I making sense?
But hell, people have run 8- and 9-speed stuff for years and years successfully. Got to be better than $ 1500 repair costs.
Those adapters might work. But they are made for a road bike dropout. So not sure how you would fit them into a horizontal track-type dropout.
It happened to me as well and Cervelo refused to warranty it. I couldn’t find anyone to fix it either.
Yeah, my bike was 8 weeks old and I couldn’t get any sort of warranty replacement either. It was painful! At least nobody was hurt in the “crash” though. Silver lining. 
if you feel like shipping your bike to Vancouver:
http://www.robertscomposites.com/gallery.html
He built a custom seat post for me, also built some custom bars for Clara Hughes at the last Olympics.
Super nice guy, very straight forward.
Maurice
Actually aren’t the drop outs and the hanger all one piece of aluminum on the P3,
Could be just a weld job.
Maurice
The dropout and hanger are all molded into the carbon - so the hanger is part of the frame - seems like an unnecessary design decision, not sure why Cervelo chooses to do this??
I found a shop in Oregon that will fix it for around $500, not including shipping. They said they would completely remove the dropout, machine a new one in house, reinstall it…good as new…
I was referred to this shop by another shop in Boulder that was not equipped to do the repair.
I have to wonder whether the shifting will truly ever be the same after a repair like this. I’m thinking it’s worth a $500 bet to find out.
Cranky, I checked the installation pdf for that hanger.
It sits 6mm further out than the factory hanger, so you’d definitely lose a sprocket.
I can’t foresee any problem using it on a horizontal dropout - the hanger screws onto the skewer. Quite a clever wee design.
$20 and your bike is a 2x9.
Thanks Barchettaman! I have now added this to my list of options. Decisions, decisions.
Hello,
We repair carbon frames and have remolded many cervelo der hanger due to cracking. We make the new drop out a bit thicker making it less prone to flexing and cracking we have a fast 7 day turnaround and can bring the bike back to a factory look. Give us a call or email for more info