I'm a Stans believer, it does all it claims. I've used Stans tubless for years. One proviso: it's best to use this system on wheels and tires you put a lot of miles on in a short time; possibly tires you wear out and replace every season. If left on rims too long, you need to add sealant periodically as the liquid evaporates. Then, the solid latex builds up on the inside of the tire, eventually adding a lot of material and weight to your wheels/tires. It's a mess to try to clean out. If the tires are on your second set of rims and are hanging in your garage, the latex solidifies in the bottom of the tire in a big stringy mass. For my spare set of wheels with mud tires (that I may not even use in a single system) I will stop using tubless with sealant and go back to tubes.