I'm just mounting the GRX FD-RX400. In the manual it says "if using a full outer model, ensure..."
What does full outer model mean and should I do that? :)
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There's a variant of this FD that is intended for frames with no housing stop at all for the cable housing. It features a housing stop that's integral to the derailleur itself. That's what they're talking about. They chose a confusing name for it because there are frames that have a housing stop near the FD/BB area that some would call a full or uninterrupted housing.