I had a 2006 GS300, I ended up putting 20" aftermarket wheels on it. I was told that due to the AWD, you have to use wheels that have a high offset. I believe mine were a +35 offset. I did have an issue with rubbing in reverse with the wheel cut. I had to put additional screws in the plastic wheel wells to lessen the noise. The aftermarket wheels also ruin the soft ride of the Lexus (The reason we all buy luxury cars). I've spent tons of money on silly aftermarket wheels only to finally determine to keep everything OEM. Lexus offers nice gun smoked 19" wheels. I would consider those before any aftermarket.