Rear D touching spokes Tink tink tink tink

[Nomadmax]

Last time this happened to me it was the end of the RD cable hitting the spokes.

[tctyres]

Originally Posted by redir

Is there a way to accurately measure a hangar to see if
it's bent without special tools?

The easiest thing is an old wheel with a threaded axle. If you thread the axle into the derailleur hanger, the wheel is large enough that you will see a bend.

Originally Posted by Nomadmax

Last time this happened to me it was the end of the RD cable hitting the spokes.

+1 The last two generations of Shimano rear derailleurs send the cable right into the spokes, and it is not easily predictable in the stand.

EDIT: sorry you said a different wheel, not a different bike ...

[marciero]

To be clear, the two different wheels you tried have the same size large cog?
Also, regarding spoking that was mentioned- I would be curious if the they are the same- same number of spokes, and if so are drive side pulling spokes elbow in or out and do they cross under or over the first spoke. This wont fix your problems but might explain partly why one is fouling and one is not.

[Tandem Rider]

If the pulling spokes on the rear are "heads in" they will slightly move the crossing point towards the derailleur. This is only a problem when in the cog closest to the spokes and usually when climbing hard. Check the spoke tension if they are hand builts.

[oldpotatoe]

I'd check der hanger first. Then, when in lowest gear, pushing the rear der toward the rear wheel whilst pedaling(in the stand, of course), does the Rder hit the spokes? Limit screw in if it does. If it doesn't, it's not the der hitting the spokes.

[tellyho]

Originally Posted by redir

Is there a way to accurately measure a hangar to see if it's bent without special tools?

Park's DAG might be the best bang for the buck I've had in tools. I use it so much - once you get one, you realize that all your hangers are out of alignment. This is in a stable of mostly steel, FWIW.