These are too small... that's your problem. About 4% if you have a sportivo by memory.
I got into an arguement with a guy in a tyre store that will remaim nameless over this, as he told me to go for these as they were cheaper and more common, but for one, they are not the correct load rating, two, not the right size so throws your speedo off by lots.
The guy basicly said I was an idiot and didn't know what I was talking about and told me I should listed to him as he's a professional tyre fitter. So prefessional that he didn't even realise that the Sportivo had a different load rating and tyre size to the standard corolla, and wouldn't listen to be when I explained it to him.
He lost my business... put me off buying wheels + tyres for a while... also missed out on getting a great set of wheels for my car too, and these guys are the only place I've found that sells them