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Sluggish shifting one side of cassette only

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Sluggish shifting one side of cassette only

Old 05-26-18, 09:57 AM
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Sluggish shifting one side of cassette only

As the title says, my rear derailleur shifts sluggishly, but only on the smaller (bigger gears) 3 or 4 cassette cogs. The top half or third of the cassette shifts fine, but the smaller cogs shift poorly when downshifting (toward the bigger cogs). It's a Di2 derailleur so I guess i expected more. I know how to adjust it inboard or outboard, but I'm guessing there's a way to do a partial adjustment so that it shifts good all throughout the range of the cassette. I've tried adjusting the derailleur inboard but at the top end of the cassette I'm starting to get that clanking noise due to being to far in at that end. But then it shifts much better at the outboard end of the cassette. Is there a technique to adjusting it all through the range?
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Old 05-26-18, 10:11 AM
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Check your derailleur hanger alignment. Di2 can only shift accurately if the geometry is normal - it has no idea how to fudge for things not being straight.
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