Dave, I've had mine on since 7/08. They have about 16,000 trouble free miles on them. They've been from Pensacola to the Carolinas, Tennessee, Kentucky and as far west as Seattle by way of Branson, Mt Rushmore, Yellowstone. From Seattle they've been to the Oregon coast, down through northern California to Reno then east to Denver, Dodge, Oklahoma City, Dallas/Ft Worth, Houston and back to Pensacola. I won't go back to duals.
Travel well, travel safe,
2006 Tiffin Phaeton - 2011 Cadillac SRX