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This is the info I need... I'm pretty sure I've got a Shimano SLX HG81 10-speed cassette on there at the moment and I see bike-discount.de are doing a very decent offer on GX AXS upgrade kit with chain and 10t-50t XG-1275 cassette so will I need to change the freehub? Will that cassette only be XG compatible or can I go Microspline?
I'm trying to minimise purchases/ potential for ordering the wrong thing as I'm pitching this as an excellent Christmas present to my wife :)
Nahguavkire
12 speed is fine if you don't want a 10t on a HG freehub, if you do then you'll need a new freehub from hope, either microspline or XD, I'd recommend microspline and a Shimano cassette and chain as they shift beautifully.