John S.wrote a review of Schwalbe G-One Speed Tire - Tubeless on January 4, 2019
Familiarity: I've put it through the wringer
I love these tires. I don't know how else to say it. I've been riding them for two seasons now, through a couple of sets of them, in everything from pure road riding, light touring, gravel, gravel that ought to really be mountain biking etc.. They really are amazing, the ride is plush, and they are fast.
Initially, I tried these on a pair of non tubeless rims. I put in tubes and road them. They felt like truck tires. Then I got them set up on a new pair of tubeless read HED Belgium rims and they had a ride and suppleness that is comparable to the tubulars I ride the rest of the time but with a far more plush ride. The weight is surprisingly close to the tubulars when run tubeless. Imagine my surprise when my average times with a 30c tire were very close to the times with 25c tires, not as fast, but very close. These are fast tires with light rolling resistance.
This last summer we did a bike tour in Norway that included riding a big part of the Rallarvegen trail through the mountains. To say this was "gravel riding" would be the understatement of the year. In the 30 miles, about 20 miles of it was through flinty rock gardens. No flats, and they held up. This was with light panniers (clothes etc... no camping gear) on top of it. And I'm a big guy. So these tires are tough. Not a mark on them.
I put these on a cyclocross frame that I have that had typically been too stiff to ride comfortably for more than about an hour. The plush ride these tires provides turned this bike into a favorite for road riding, for exploring and for light touring. It's an all day ride.
As others have said, these are not the tires that are going to last untold miles. They won't last as long as other tires but they kill them with a great ride and performance. It's a tradeoff that works very well in favor of the Schwalbe tires. They'll put a smile on your face and you will be amazed. Highly recommended.