A couple weeks ago, I put on a pair of 38mm Panaracer Gravel Kings, herringbone tread. I got to say they are such a world of difference over the 35mm Continental Hardshells previously installed. They feel so good its hard to keep from smiling. My wife is convinced that she can't keep up with me now, of which I am dubious because its usually the other way around, and maybe she's only humoring me long enough to have my moment in the sun, then she'll mercilessly drop the hammer and really leave me in the dust.