What size winter tires will fit on my 1st gen OEM wheels.

Hey dudes. So I have the original stock TRD OR wheels sitting on my balcony with old janky tires on them. I'm about to buy some dedicated winter tires to throw on and I'm wondering what size range of tires will fit.

I'm NOT interested in the biggest tire I can get. I'd actually rather run a smaller width winter tire. The stock tire size is 265/70r16. Can I run a skinnier winter tire with those stock wheels, and if so, what width sizes will they run?

Thanks.

 

Tirerack is telling me that 245/75r16's will fit. I wanted to get the experts' opinions before I drop $500 on new Blizzaks.