Same size tires are not going to be the same height when stretched across a wider span (10.5) than a tire across a narrower rim (9.5). As long as the tire pressure is at recommended pressure and tread at about the same wear, measure the distance from floor to top of tire. Then calculate the difference to see if it is greater than 3%. The OE size tires on 87 rims are 315x35 on 10.5 rim and 275x40 on 9.5 rims. Different mfg. tires can be different heights but as long as all four tires are the same brand and proper sizes the set should still be within the 3% front to rear. The OE sizes provide a tire that will fit the size rim properly as far as tire seal and tire overhang. If the differences between your tire height front to back is greater than 3% it is something you should correct. If not, I suggest you check a tire store like Discount tire to see if the tires you have on the 10.5 rims are too narrow, a safety issue. FYI- I really liked the Toyo tires. I have tried many brands out there and now go with Continental Extreme as they are less expensive, have the softer ride (like Toyo), great wet and dry grip and last double the miles.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas