Though this should not be that complicated, I have a question about installing a RD into the derailleur hanger. I just returned from a trip where I removed the rear derailleur for travel. I have Campy Super Record 11 and when screwed it back into the hanger, I met resistance after it was about 2/3’s of the way in. I didn’t put too much torque on it after that and ultimately after several tries got it to seat properly. The mechanic at our camp had similar problems assembling the bike and in fact did tighten it quite a bit before figuring out it was not properly seated. My questions are: 1) Is there a trick to this?, and 2) Could the hanger be damaged by cross-threading the screw into the hanger? Right now it looks seated and tight but I want to try to avoid this problem in the future.
The bolt should go in quite easily and then finish with a firm flat seating of the system to the hanger. You do need to use grease on the system, a nice heavy one like Phil Wood (unless you have a Ti hanger - and then you use Ti-Prep). It would be a good idea to have your mechanic chase the threads on the hanger just to be sure you are square, I would also put a DAG-1 on the frame just for good measure.
11 speed can be finicky and if your hanger is not square you sure will hear it.
R10C:
Thanks. What is a DAG-1? Campy’s website they describe using a Campy UT-VS030 tool to align the RD and hangar. Does not look practical for travel. Thanks again.
DAG is the same tool, only from Park…and no - not for travel.
Lemme guess - aluminum hanger? Sounds like it could be cross-threaded. You might want to try chasing the threads. They are M10x1 - http://harriscyclery.net/product/park-tools-10-x-1.0-mm-frame-derailleur-hanger-tap-tap-10-632.htm . In the late 1980’s when I was traveling with my aluminum bike a lot, I cross-threaded the hanger. I ended up putting in a threaded insert (Helicoil).