Cassette vélo Shimano Sora HG400 11x25 - 9 vitesses - Cdiscount Sport
Cassette 9 vitesses Shimano Sora CS-HG50
In case anyone is wondering, on a Sora 9-speed derailleur, you can fit a 42 tooth sprocket and a 11-42 cassette with no issues. Shown on a 2016 Trek Crossrip Elite. : r/gravelcycling