I put these 35's on my Surly Straggler to replace the stock Knards it came with. I do most of my riding on city pavement and didn't want a full on gravel setup. These ride great on pavement and absorb the bumps nicely. I also hit some dirt and gravel occasionally with no issues. They're beautiful too, I just left the bike in my living room to stare at it once these were on. Coming from a 23 road bike setup for years putting these on was life changing. Still feels like a road bike, but with added comfort and confidence.
I'd read accounts of this being a favorite tire for many commuters. I got a pair (tubeless) for upgrades to a new All City Space Horse. I've only taken a couple of rides since finishing that project and mounting the tires, but I can tell you that they have an excellent road feel. Yes, they are pretty tight and you'll need to get that firs bead in the center of the rim before trying to get that last 4-5 inches of the other side mounted, but it wasn't a problem for me. I don't have plans to run them tubeless right now, but I could if I changed my mind. Brown sidewalls look really cool with matching bar tape.
This is the best purchase I have made in a long time. I live in an area with really bad roads, debris, sand, cracks and just overall poor conditions. I frequently ride in a State Park (USA)that has no bike lanes and some rocky gravel portions on the trail. These tires handle so the poor roads so well. Loose gravel not an issue. Rain, you can feel the grip. Bumpy roads not so bad now with the 26mm tires. I will be buying a second pair and I am considering making these my permanent tires.
I searched for months for the "perfect" all-road tire---something that would be snappy enough on pavement, but still be able to hold its own in gravel and on light singletrack. I finally landed on the GravelKing SS, and it's everything I hoped it would be. I opted for a 35c, which measures out to right at 37.5 on my Zipp 303 S wheels, and it's shockingly fast for such a fat tire. Honestly, it's faster on tarmac than I expected, and it cuts through light gravel and beat up roads like nothing. I'm running 35 PSI in the front and 40 in the rear (I'm 144 lbs/65.5 kg) and it's like riding on a cloud. A fast, snappy, responsive cloud. I honestly can't say enough good things about these tires---if you're looking for an excellent all-road tire for dry conditions, stop reading and add them to your cart.