Just upgraded the 225 Conti HSR's to a 245 traction tire. Tried the Toyo M608z first. That was an epic 2 month long failure. About the only thing I liked was the way they looked, and I'm a huge fan of Toyo. Tires bounced and shook, wicked tread squirm, and very noisy. At one point on a test drive, the tire shop manager even commented on how difficult it was to keep the truck in one lane.
http://powerstrokearmy.com/photopost/data/692/medium/20160616_163009.jpg
So after 4 attempts at rebalancing, replacing 2 defective tires, destroying and then replacing my two front rims, the tire shop manager called his corporate office, and decided the Toyo's weren't ever going to run smooth, and we swapped for 245 Michelin XDS2's.
http://powerstrokearmy.com/photopost/data/692/medium/20160709_220304.jpg
Like night and day. Smooth, quiet, minimal squirm, and great traction. I still like the look of the Toyo tread pattern better, but not enough to ruin the ride of my truck. Hope this helps others looking to upgrade their 19.5" tires.