Best tubes I have ever used. Lasts a long time, never had a pinch flat. used exclusively in racing Hare Scrambles in rocks and roots of PA.
Never have I ever bought a better tube
These tubes are exactly what they say they are! You can tell just by touching them that they're made out of heavy duty material!
I've put them to the test on the tracks and they are holding up well! I have not had to add air yet!
never had a flat with these while running them. Very tough.
4 lbs for a tube is silly. If you are going this route, just run a moose. You're already spending 70 plus bucks for a natural rubber tube that won't hold air for that long anyway. You need to see a shrink if you spend that much on a tube.