I also thought the Tundra would have a lot more power then it demonstrated with the 33's. In stock form it never had a problem. After raising it 2" and putting on the M/TÆs, which brought it up another inch or so, and putting it's nose into a stiff wind the ole gal couldn't take it. It kept kicking in and out of OD on slight grades. The tire diameters are 30.7 for stock and 33.3 for the M/T's = .085%. I thought about the 430's first but changed my mind to the 456's for the little extra that it will give me while cruising in hilly terrain with the OD on and when bouncing along in 4H. I suppose when I get into some serious gumbo those 456Æs might test the front axles. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />