This time, they had their OWN test device. They built their own "treadmill like" device to measure the rolling resistance. No, they didn't go to Conti this time.
The Schwalbe ZX's now also use the (expensive) Vectran and improved a TON (both in RR & flat resistance) from their last test. The Specialized clincher Tony Martin flatted on twice? Yeah, similar RR than 4000S but zero flat resistance.
Edit: They used 100g butyl tubes for the test.
The GP TT (test winner) is around $46 on crc if you wanna get one.
The lighter bar on the top figure is the time until the tire flatted on a pulsating (dull) blade. The darker one is the force it took to drive a 5.5mm blade through it.
They also noted that because of their new test setup (which basically simulated real world road better than the previously used roll) the worse and good tires are closer together than before. Before they were around 20W better, now only around 10W.
The Schwalbe ZX's now also use the (expensive) Vectran and improved a TON (both in RR & flat resistance) from their last test. The Specialized clincher Tony Martin flatted on twice? Yeah, similar RR than 4000S but zero flat resistance.
Edit: They used 100g butyl tubes for the test.
The GP TT (test winner) is around $46 on crc if you wanna get one.
The lighter bar on the top figure is the time until the tire flatted on a pulsating (dull) blade. The darker one is the force it took to drive a 5.5mm blade through it.
They also noted that because of their new test setup (which basically simulated real world road better than the previously used roll) the worse and good tires are closer together than before. Before they were around 20W better, now only around 10W.