Tires: rim size and tire size, tacoma prerunner, alloy rims

Question
Hi , I have a 2000 Tacoma prerunner ex/cab (45000 miles) with toyota 15X7" alloy rims with 265 75 X 15 wrangler r/t tires. I need new tires . Door post states orginal tires should be 225 75  X 15 .i want to put highway  235 70 15 tires on it , tire dealer says I need to stay with the 265 75 15 tires.Cost more and my speedometer seems to read faster than I am actually going.Can I reduce the tire size back to what the manufacturer recommends with same rims ?Thanks

Answer
Ernie,

The fact that the placard says the vehicle originally came with P225/75R15's says that you should be able to put that size on.  That is, of course, unless the vehicle has been modified.

If you are worried about the rim width - your vehicle came with both 6" and 7" rims.  No problem there!