Schwalbe

Great grip uphill and down on loose rocky surfaces. Have also descended some pretty chunky stuff and they have withstood the durability test. Haven't ridden enough on pavement to have a strong opinion there yet, but if you ride rougher terrain, I'd recommend these. No issues with seating the tire tubeless and no punctures yet.

These are better than Presta valves in every possible way. They are easier to use, have better airflow, and are much, much more robust. It has been a while since I've broken off a Presta valve, but I have done it, and I've got a few that have a disturbing bend to them. I've bought replacement Presta valves, but some of the cheap ones don't seal very well and are worthless. I tried Clik valves out and immediately realized how much better they are. Now I can't wait for this to become the standard for bicycles. I've replaced valve cores on my most-used wheels, and will work my way through the other wheelsets as I can. Hopefully these will come down in price, and we will get more pumps that provide native support.

I'm switching my fleet over to click valves and other than the cost, I have no complaints. My wife appreciates the ease of use when filling her tires vs. her old presta valves. I've had no issues so far with sealant clogging them. I'm using adapters on my pumps, but may eventually convert one pump using the pump head conversion kit.

The only 'problem' I've had was that I can't use my battery-powered car tire inflator through an adapter, through the click valve, and then through an SKS AirSpy TPMS. The air flow is too restricted and the inflator cuts off right away. No issues using that setup with a floor pump, and I doubt that many people are running TPMS on their bikes.

These are the best all around mtb tires at the moment. They work in a wide range of conditions. If you're looking for a race tire this is the one.

Thank you BTD for having the best tire selection and amazing customer service