• I run 11-46t on my GRX 812, works pretty well. As usually Shimano are very conservative with their specs

  • Only 1x.

    I'm not sure in 2x mode you would have enough capacity... and isn't the main advantage of 2x to have smaller jumps between sprockets? The jumps on the low gears on my setup (42 x 11-46) do feel pretty big, definitely a downside

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