I used a Goatlink (https://www.wolftoothcomponents.com/products/goatlink) when using a GRX 810 RD (rated for 34t cassette) with an 11-42 cassette and two chainrings up front. But you need a shadow RD for that to work, which yours isn't.
Nick -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/3ddf5c1a-e668-4e0e-a42a-b7741bece58dn%40googlegroups.com.
