I've had 2 sets of Toyo AT3's this year, both sets were C load. 1 was 285/70/17 purchased and installed from local DT. Instantly getting wheel shake on freeway speeds, right where everyone else is experiencing theres starting from 48 mph all the way up to 65 mph. Sometimes worse when the tires are cold. Had them re-balanced 3 times at the same DT and same outcome, 3rd time they blamed the wheel spacers. Sold the tires and upsized to 285/75/17. By the numbers it doesnt look like a big difference but side by side, you could easily tell how much taller the 285/75 are. Bought them and installed at a different tire shop. Was very eerie about the same results as the 33s but noticed NO wheel shakes at any speed. So go and try at a different reputable shop.