The tyres are more expensive too for 10" rims, as you have to get the big 195/50 R10's so they don't look ridiculously narrow
I dread to think how much they'd cost, for a decent brand it's more than likely going to be at least €100 a corner, they're not exactly mass produced
Cars in general are a lot of screwing around, I've different size tyres front and rear (145/50 front as opposed to 155/60 rear) as two needed replacing due to perished rubber, plus a different sized spare (165/40, low profile :tilt
too