After my brother put 20s with some Toyo offroad tires (305/55-20s) on his Titan the steering wheels wobbled after going over 50mph or so. Another friend put some 20 inch wheels plus 275/55-20 tires on his 2005 Ford F-150 and he is experiences the same thing. He even took the tires to his Dad's commercial garage and re-balanced them with the same results. He claims that eveyone he knows that have put 20 inch wheels on their trucks experienced this phenomenon as well. Will those with actual experience with 20 inch wheels/tires on the RL share their experience with the affects of the wheels/tires change? By the way, both the Titan and F-150 had the overall diameter of the tires increase over one inch, so that may be the reason for the wobbling.