As I posted before, I have put CounterAct beads in my tires. Beware, that even though I used the supplied new shcrader valves, when I went to check air pressure yesterday before a ride, the valves, ( all 3 of them,) STUCK OPEN!! Not a big deal to clear it out in my shop, where I have an air supply, but this would SUCK if you did it on the side of the road somewhere! A shot of air pressure cleared it right out, but thought I should tell you all to beware. The supplied valves are supposed to be "unaffected by dust". Well, they got that one wrong! jimsjinx