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Been looking at Gravel King SK's as I'm looking to max out the tyres on my Diverge.
Can anyone confirm if the 35mm is actually 38mm as some of the reviews online state?
I found them very draggy but came up around the 38mm - used them once and got rid. Use these in preference.

yes the 35s measured about 37-38 for me too - thats on a 23mm rim. As for being draggy, the question would be in comparison to which tyre? The one posted above is a smoother file tread so it would be smoother rolling but also less grippy so its a bit oranges and apples surely?
I like them, yes they're a bit whiny on smoother tarmac but thats not really what they're for. I found the grip to be pretty good until it gets wet and muddy, puncture resistance seems good so far and they go on well tubeless.
Herself had some on for a couple of weeks, she complained that apart from being very draggy on paved surfaces they also felt very wooden.
We've sold loads & to repeat customers, so real world review is all good. They are using them for gravel duties though not just commuting on tarmac
I've had one on the back of my "gravel"/commuting bike since Christmas.
Had my fifth puncture of the month today , don't think I had that many in a year on the Sammy Slick it replaced. Tiny thorns and pieces of glass seem to barely get through the tyre and eventually catch the tube.
Other than that, I quite like it - lighter and rolls better than the Sammy Slick, a bit more grip away from tarmac.
Got 'em. Love 'em. 35mm version.
50% tarmac, 40% paths, 10% singletrack.
Got them tubeless, and there is a sweet spot around 45-50 psi where they are nice and supple and smooth.
Good grip until it starts getting too muddy.