I use these for racing cross because they are a little more forgiving than other tubes and they add an element of suspension to your ride. They have a removable core which I squirt 2 oz of Stans in during the fall when we get thorns. Usually I have to redo my Stans treatment in my tubeless mountain bike set up once a month because it dries up. In these tubes the Stans stayed viscous for over four months. Like all latex tubes you have to pump them up before every ride.