On your left.
RD7700-GS compatible with 12-30 cassette?
I'm considering a custom 12-30 Ti cassette from cycle dynamics and am worried that the B-adjustment won't cover the 30t cog. I currently run a 12-27 cassette. The 7700-GS covers a 38t range which I'm OK with, but typically road cassettes only cover a 27t cog. I maxed out the B-adjustment and even flipped the screw around and it seems like it would work, but . . .
I've run a 7400 series r derailleur on a 30T cog with the b tension screw only halfway.
Oh and mine was the SS cage...with the GS cage you should be able to easly run a 32T
chips & bier
hang a 32t in there
Some derailleur hangers are long enough, some just aren't. The only way to find out is stick an 11-34t cogset in there, and see if you can get the derailleur to run w/o dragging in the next-to-last gear, which is a 30t on Shimano models.