Originally Posted by PoorInRichfield

While riding my Domane in "gravel mode" (i.e., 700x38C tires) on a rails-to-trails trail this past summer, I was happy to have all the front shock vibration I could get when I hit about 5 gopher holes on the trail. The second I turned to look at something other than the trail's surface, I'd hit one of these holes that sent a mc-nasty shock from my hands straight into my brain (or so it felt). I didn't suffer any long-term injury from the impacts on the ride but can't image how painful things would've been on a bike with less shock absorbing features than my Domane.

As stated by others, it's not clear to me as to why front ISO speed wouldn't be on the Checkpoint if it actually works since gravel certainly would be the lumpiest surface short of actual mountain bike trails.