Thread: Ultegra to GRX.. yeah, another thread
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Old 03-21-23, 07:25 PM
  #12  
sdimattia
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Join Date: Mar 2019
Location: NY
Posts: 307

Bikes: Wabi Classic, Bombtrack Hook, Bombtrack Tension, Vitus Substance

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I run a GRX 812 rear derailleur with 46/30 crank and 11-42t cassette. I swapped out the GRX derailleur cage for a XT SGS (long cage). The low end gives me 19GI on 650b x 40 tires . . .
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