Well, to start off I'm on my fourth set of wheels and tires, no reason I just like changing wheels/tires for different looks. Anyway, I had a set of 20's put on w/Nitto 305/55/20s and I'm now noticing two problems that I've never had before w/ the 17" wheels. The 1st is I have a pulsating vibration (kindof a howling vibration) coming from the drivetrain at about 75-80 mph, it's not real bad yet, but it's for sure different since the install. The 2nd problem is a faint clunking noise when I accelerate or hit a bump sounds like either a u joint or a shock mount, but I've looked and I can't see anything obvious. Thanks for any help!!