You can probably look up the specific tires on tire rack for mfr. recommendations
I clicked Yokohamas of this size and it stats the max width is 9". I would imagine that you could stretch these to fit, but should you? I don't see why you would. It doesn't sound like you're of the "stretch and poke" type, and it would decrease your performance and safety. To me, that equals not worth whatever cash you're saving.
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