8400 miles saw off our original Khumos and I'm not surprised; the i10 is a slippery wee bugger under acceleration and those tyres had virtually no rubber in them, they were all carbon-black and filler!
We now run Goodyear DuraGrip at both ends of the car: they handle better and reduce understeer and we're getting 12-13000 miles out of them. They're not cheap at £80 each but car feels better on them. And yes, we DO thrash the car and whizz about in it, I didn't know there was any other way of driving it !
Rear tyres tend of course to last twice as long as fronts, unlike my motorcycle which does two rear tyres to each front: it all depends on which end of the vehicle does the driving.
I have covered nearly 20k and the original Kumho Solus KH17s have about 3mm left. Grip is ok, surprisingly so in the wet. Traction in snow last winter wasn't brilliant though. I am going for Goodyear Duragrip too when the time comes. Noise is a real annoyance at the moment and the Goodyear tyre is quieter apparently.