It's an old 26" hardtail that belongs to a friend.
While riding together the other day, I noticed the rear wheel was wobbling quite a bit,
so I brought it over to do an overhaul with my clumsy hands and try to true the wheel.
When I disassembled the sprocket,
the chain went over the inner and hit the spokes.
It's a Deore XT hub with Mavic wheels, but... well, it's reached the end of its life.
I'm just going to put my spare wheel on it.