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hippy
It's a Canyon Grail L size. Mine is from 2019 but I don't think the geometry has changed so that means a chainstay of 425mm.
For chain size I used https://www.omnicalculator.com/sports/chain-length and 430mm for the chainstay length, giving a 114 links result.
But like I said, even w/o the chain the RD doesnt go all the way up when clutch is on. (And the FD is in small ring). With cluth off there is no problem.