12-speed 105 mechanical and new GRX | Everything we know so far about Shimano’s new groupsets
The BikeRadar Podcast
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Shimano's GRX Group Sets
Shimano Jura X is all still 11-speed. And there is a single Di2 version available at the top end. But that Di2 version is kind of more of an all-tegra level group set, shall we say? Shimano ACE GRX hasn't seen an update since 2019. It also uses currently Shimano's HG standard free hub which limits the kind of smallest cassette cog to an 11-tooth cassette cog.
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