Rolls fast for ROLLFAST... I love these tubes. I originally bought them for my TT bike to compete in the 6hr World Championship race. After I put them on that bike I immediately felt the speed increase and put them on both of my Factor o2 road bikes. At the right pressure (90psi for me), I know I'm going faster!
Best latex tubes out there’
I won't use anything but latex going forward
First time latex tube user, so consider the source. I was pleasantly surprised by how easily the valve extender was attached using the included wrench tool. Tube went in easily, and holds air much better than I expected. I didn’t test rolling resistance before and after, but I beat my expected race time by 1.5% so they didn’t hurt. Last, I hit a couple of horrible road cracks that hammered my tires. I expected a pinch flat, but no damage. Couldn’t be more satisfied.