I have followed Eric F's threads through several iterations of different front (grippier) and rear (faster rolling) tires. I have not tried the same because I am one of those chicken___ roadies with no off-road bike handling skills. On my more recent gravel rides the rear end of my Stigmata (matching Panaracer SK 40 mm) is getting increasingly skittish, even though I am not locking the rear brake. It turns out the increased wear on the rear tire has over time morphed me toward the same setup.