My unscientific rolling testing at 20 mph (32 kph) showed the new VF Record clinchers to be slower than my Corsa Speed 2.0 set up with inner tube. Not significantly slower, but slower nevertheless. I used Silca 700 x 24-30mm latex inner tube for the test runs. BRR also got similar test results: https://www.bicyclerollingresistance.com/road-bike-reviews/veloflex-record
Did AeroCoach receive a magic, special VF Record clincher for their test?
Brr test with butyl tubes. We’ve done and redone the VF record data on rollers, round a wooden velodrome and also round a tarmac velodrome with the same results!