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Old 05-11-21, 05:44 AM
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Location: St Louis Missouri
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Bikes: 19 Gunnar Hyper-X Ultegra Disk, 17 Specialized Sequoia Elite

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Originally Posted by jp911 View Post
I have a very similar setup to what you're describing: Ultegra shifters, GRX812 rear derailleur, and an 11-42 cassette (crankset is 1x Easton EC90 with a 40 tooth chainring). Works perfectly!

As has been pointed out, it's really not going to work with a 2x crankset and front derailleur.
My GRX 812, 11/42 and 1X 40T arives today
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