The X-horizon ones won't. They have a horizontal parallelogram, and the movement of the jockey wheel laterally is controlled by the chain shortening as you shift up the cassette. A front shift will fuck it up.
As I expected. Thank you for the explanation.
@Tomo187 started
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The X-horizon ones won't. They have a horizontal parallelogram, and the movement of the jockey wheel laterally is controlled by the chain shortening as you shift up the cassette. A front shift will fuck it up.