Wanted Set of wheels needed

[Rotorhead]

What discipline were these rims for ? I’m current building up a cad 2 as a trials bike need a solid set of wheels I’d be interested possibly.

I don’t know anything about them but they are “XM” - cross mountain. A bit of googling says they are wider than usual (for the time), a bit beefier than XC is my read https://www.tritoncycles.co.uk/components-c9/rims-c123/mavic-xm719-cross-mountain-disc-rim-p9906
https://fawkes-cycles.co.uk/mavic-xm719-bk-32-hole-disc-brake-rim-p19382