Quote:
Originally Posted by RobJ
Large chainring, large cog, with the chain not threaded through the RD is the way I have been sizing chains for my bikes. Add two extra rivets using a master link chain. Never an issue.
I am finishing up a build and adjusting the derailleurs and the chain won't shift into the last two large cogs when in the large front ring. Realize that brings up cross-chaining and not a way you would normally ride, but still should shift into this combo. It's a 11-28 cassette and Ultegra 6870 reg cage RD. Spec'd at 28t max. When trying to shift up the rear the chain totally locks up. The RD pulleys are pretty much horizontal which makes me think its a chain length issue. If the FD isn't aligned or adjusted enough outward, I see where that could be an issue, but then it wouldn't shift properly in other cogs/combos. Any thoughts?
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Chain(obviously) too short..try small-small and chain just off the bottom of the rear der...spring just starting to be pulled..