My 07 C&C came with General tires, had vibrations I never found, until I changed out to Michelins. Dump the Nexens, Michelins are far superior than Nexens. I can't figure out why you pay 80 to 90K dollars for junk tires. My 3500 SRW came with Firestone Transforce tires, and after three flats, one left me in the middle of the desert and AAA wouldn't show,
the first thing I did was switch to Michelins Defenders LTX M/S tires when I got home. I even found Michelins, although its the passenger tire version, for my wife's Highlander. Big difference in handling, as well as better quality and longer life.